mus: Remove unnecessary const from property TypeConverter templates

This allows them to be used with the idiomatic mojo::ConvertTo<Foo>() template.

(In particular, ConvertTo<Foo>(my_vector) matches my_vector to "const U&" to
determine which TypeConverter to call. If my_vector is either a "std::vector"
or a "const std::vector" it ends up looking for TypeConverter<Foo, std::vector>.
Since the second TypeConverter template parameter isn't const, the compiler
can't find our existing TypeConverter<Foo, const std::vector> functions. These
functions don't need their template parameter to be const std::vector, as they
use "const std::vector&" for their inputs regardless.)

BUG=none
TEST=compiles

Review URL: https://codereview.chromium.org/1832133002

Cr-Commit-Position: refs/heads/master@{#383366}

13 files changed, 56 insertions, 75 deletions

diff --git a/ash/mus/shelf_delegate_mus.cc b/ash/mus/shelf_delegate_mus.cc
index 5b06eda..7dbff29 100644
--- a/ash/mus/shelf_delegate_mus.cc
+++ b/ash/mus/shelf_delegate_mus.cc
@@ -85,8 +85,7 @@ class ShelfItemDelegateMus : public ShelfItemDelegate {
 gfx::ImageSkia GetShelfIconFromBitmap(
     const mojo::Array<uint8_t>& serialized_bitmap) {
   // Convert the data to an ImageSkia.
-  SkBitmap bitmap = mojo::ConvertTo<SkBitmap, const std::vector<uint8_t>>(
-      serialized_bitmap.storage());
+  SkBitmap bitmap = mojo::ConvertTo<SkBitmap>(serialized_bitmap.storage());
   gfx::ImageSkia icon_image;
   if (!bitmap.isNull()) {
     icon_image = gfx::ImageSkia::CreateFrom1xBitmap(bitmap);
diff --git a/ash/mus/sysui_application.cc b/ash/mus/sysui_application.cc
index 5fd5aac..9230248 100644
--- a/ash/mus/sysui_application.cc
+++ b/ash/mus/sysui_application.cc
@@ -131,14 +131,13 @@ class NativeWidgetFactory {
       mash::wm::mojom::Container container = GetContainerId(params);
       if (container != mash::wm::mojom::Container::COUNT) {
         properties[mash::wm::mojom::kWindowContainer_Property] =
-            mojo::TypeConverter<const std::vector<uint8_t>, int32_t>::Convert(
+            mojo::ConvertTo<std::vector<uint8_t>>(
                 static_cast<int32_t>(container));
       }
       mash::wm::mojom::AshWindowType type = GetAshWindowType(params.parent);
       if (type != mash::wm::mojom::AshWindowType::COUNT) {
         properties[mash::wm::mojom::kAshWindowType_Property] =
-            mojo::TypeConverter<const std::vector<uint8_t>, int32_t>::Convert(
-                static_cast<int32_t>(type));
+            mojo::ConvertTo<std::vector<uint8_t>>(static_cast<int32_t>(type));
       }
     }
 
diff --git a/components/mus/public/cpp/lib/property_type_converters.cc b/components/mus/public/cpp/lib/property_type_converters.cc
index 01c74a2..9503b9b 100644
--- a/components/mus/public/cpp/lib/property_type_converters.cc
+++ b/components/mus/public/cpp/lib/property_type_converters.cc
@@ -23,8 +23,7 @@ const int kMaxBitmapSize = 4096;
 namespace mojo {
 
 // static
-const std::vector<uint8_t>
-TypeConverter<const std::vector<uint8_t>, gfx::Rect>::Convert(
+std::vector<uint8_t> TypeConverter<std::vector<uint8_t>, gfx::Rect>::Convert(
     const gfx::Rect& input) {
   std::vector<uint8_t> vec(16);
   vec[0] = (input.x() >> 24) & 0xFF;
@@ -47,7 +46,7 @@ TypeConverter<const std::vector<uint8_t>, gfx::Rect>::Convert(
 }
 
 // static
-gfx::Rect TypeConverter<gfx::Rect, const std::vector<uint8_t>>::Convert(
+gfx::Rect TypeConverter<gfx::Rect, std::vector<uint8_t>>::Convert(
     const std::vector<uint8_t>& input) {
   return gfx::Rect(
       input[0] << 24 | input[1] << 16 | input[2] << 8 | input[3],
@@ -57,8 +56,7 @@ gfx::Rect TypeConverter<gfx::Rect, const std::vector<uint8_t>>::Convert(
 }
 
 // static
-const std::vector<uint8_t>
-TypeConverter<const std::vector<uint8_t>, gfx::Size>::Convert(
+std::vector<uint8_t> TypeConverter<std::vector<uint8_t>, gfx::Size>::Convert(
     const gfx::Size& input) {
   std::vector<uint8_t> vec(8);
   vec[0] = (input.width() >> 24) & 0xFF;
@@ -73,16 +71,15 @@ TypeConverter<const std::vector<uint8_t>, gfx::Size>::Convert(
 }
 
 // static
-gfx::Size TypeConverter<gfx::Size, const std::vector<uint8_t>>::Convert(
+gfx::Size TypeConverter<gfx::Size, std::vector<uint8_t>>::Convert(
     const std::vector<uint8_t>& input) {
   return gfx::Size(input[0] << 24 | input[1] << 16 | input[2] << 8 | input[3],
                    input[4] << 24 | input[5] << 16 | input[6] << 8 | input[7]);
 }
 
 // static
-const std::vector<uint8_t>
-    TypeConverter<const std::vector<uint8_t>, int32_t>::Convert(
-        const int32_t& input) {
+std::vector<uint8_t> TypeConverter<std::vector<uint8_t>, int32_t>::Convert(
+    const int32_t& input) {
   std::vector<uint8_t> vec(4);
   vec[0] = (input >> 24) & 0xFF;
   vec[1] = (input >> 16) & 0xFF;
@@ -92,45 +89,38 @@ const std::vector<uint8_t>
 }
 
 // static
-int32_t TypeConverter<int32_t, const std::vector<uint8_t>>::Convert(
+int32_t TypeConverter<int32_t, std::vector<uint8_t>>::Convert(
     const std::vector<uint8_t>& input) {
   return input[0] << 24 | input[1] << 16 | input[2] << 8 | input[3];
 }
 
 // static
-const std::vector<uint8_t>
-TypeConverter<const std::vector<uint8_t>, base::string16>::Convert(
+std::vector<uint8_t>
+TypeConverter<std::vector<uint8_t>, base::string16>::Convert(
     const base::string16& input) {
-  return TypeConverter<const std::vector<uint8_t>, std::string>::Convert(
-      base::UTF16ToUTF8(input));
+  return ConvertTo<std::vector<uint8_t>>(base::UTF16ToUTF8(input));
 }
 
 // static
-base::string16
-TypeConverter<base::string16, const std::vector<uint8_t>>::Convert(
+base::string16 TypeConverter<base::string16, std::vector<uint8_t>>::Convert(
     const std::vector<uint8_t>& input) {
-  return base::UTF8ToUTF16(
-      TypeConverter<std::string, const std::vector<uint8_t>>::Convert(
-          input));
+  return base::UTF8ToUTF16(ConvertTo<std::string>(input));
 }
 
 // static
-const std::vector<uint8_t>
-TypeConverter<const std::vector<uint8_t>, std::string>::Convert(
+std::vector<uint8_t> TypeConverter<std::vector<uint8_t>, std::string>::Convert(
     const std::string& input) {
   return std::vector<uint8_t>(input.begin(), input.end());
 }
 
 // static
-std::string
-TypeConverter<std::string, const std::vector<uint8_t>>::Convert(
+std::string TypeConverter<std::string, std::vector<uint8_t>>::Convert(
     const std::vector<uint8_t>& input) {
   return std::string(input.begin(), input.end());
 }
 
 // static
-const std::vector<uint8_t>
-TypeConverter<const std::vector<uint8_t>, SkBitmap>::Convert(
+std::vector<uint8_t> TypeConverter<std::vector<uint8_t>, SkBitmap>::Convert(
     const SkBitmap& input) {
   // Empty images are valid to serialize and are represented by an empty vector.
   if (input.isNull())
@@ -165,7 +155,7 @@ TypeConverter<const std::vector<uint8_t>, SkBitmap>::Convert(
 }
 
 // static
-SkBitmap TypeConverter<SkBitmap, const std::vector<uint8_t>>::Convert(
+SkBitmap TypeConverter<SkBitmap, std::vector<uint8_t>>::Convert(
     const std::vector<uint8_t>& input) {
   // Empty images are represented by empty vectors.
   if (input.empty())
diff --git a/components/mus/public/cpp/property_type_converters.h b/components/mus/public/cpp/property_type_converters.h
index cec17d6..20c0768 100644
--- a/components/mus/public/cpp/property_type_converters.h
+++ b/components/mus/public/cpp/property_type_converters.h
@@ -27,58 +27,58 @@ namespace mojo {
 //             replaced with the skia.Bitmap mojom struct serialization.
 
 template <>
-struct TypeConverter<const std::vector<uint8_t>, gfx::Rect> {
-  static const std::vector<uint8_t> Convert(const gfx::Rect& input);
+struct TypeConverter<std::vector<uint8_t>, gfx::Rect> {
+  static std::vector<uint8_t> Convert(const gfx::Rect& input);
 };
 template <>
-struct TypeConverter<gfx::Rect, const std::vector<uint8_t>> {
+struct TypeConverter<gfx::Rect, std::vector<uint8_t>> {
   static gfx::Rect Convert(const std::vector<uint8_t>& input);
 };
 
 template <>
-struct TypeConverter<const std::vector<uint8_t>, gfx::Size> {
-  static const std::vector<uint8_t> Convert(const gfx::Size& input);
+struct TypeConverter<std::vector<uint8_t>, gfx::Size> {
+  static std::vector<uint8_t> Convert(const gfx::Size& input);
 };
 template <>
-struct TypeConverter<gfx::Size, const std::vector<uint8_t>> {
+struct TypeConverter<gfx::Size, std::vector<uint8_t>> {
   static gfx::Size Convert(const std::vector<uint8_t>& input);
 };
 
 template <>
-struct TypeConverter<const std::vector<uint8_t>, int32_t> {
-  static const std::vector<uint8_t> Convert(const int32_t& input);
+struct TypeConverter<std::vector<uint8_t>, int32_t> {
+  static std::vector<uint8_t> Convert(const int32_t& input);
 };
 template <>
-struct TypeConverter<int32_t, const std::vector<uint8_t>> {
+struct TypeConverter<int32_t, std::vector<uint8_t>> {
   static int32_t Convert(const std::vector<uint8_t>& input);
 };
 
 template <>
-struct TypeConverter<const std::vector<uint8_t>, base::string16> {
-  static const std::vector<uint8_t> Convert(const base::string16& input);
+struct TypeConverter<std::vector<uint8_t>, base::string16> {
+  static std::vector<uint8_t> Convert(const base::string16& input);
 };
 template <>
-struct TypeConverter<base::string16, const std::vector<uint8_t>> {
+struct TypeConverter<base::string16, std::vector<uint8_t>> {
   static base::string16 Convert(const std::vector<uint8_t>& input);
 };
 
 template <>
-struct TypeConverter<const std::vector<uint8_t>, std::string> {
-  static const std::vector<uint8_t> Convert(const std::string& input);
+struct TypeConverter<std::vector<uint8_t>, std::string> {
+  static std::vector<uint8_t> Convert(const std::string& input);
 };
 template <>
-struct TypeConverter<std::string, const std::vector<uint8_t>> {
+struct TypeConverter<std::string, std::vector<uint8_t>> {
   static std::string Convert(const std::vector<uint8_t>& input);
 };
 
 // NOTE: These methods only serialize and deserialize the common case of RGBA
 // 8888 bitmaps with premultiplied alpha.
 template <>
-struct TypeConverter<const std::vector<uint8_t>, SkBitmap> {
-  static const std::vector<uint8_t> Convert(const SkBitmap& input);
+struct TypeConverter<std::vector<uint8_t>, SkBitmap> {
+  static std::vector<uint8_t> Convert(const SkBitmap& input);
 };
 template <>
-struct TypeConverter<SkBitmap, const std::vector<uint8_t>> {
+struct TypeConverter<SkBitmap, std::vector<uint8_t>> {
   static SkBitmap Convert(const std::vector<uint8_t>& input);
 };
 
diff --git a/components/mus/public/cpp/tests/property_type_converters_unittest.cc b/components/mus/public/cpp/tests/property_type_converters_unittest.cc
index 7726172..f1a4b89 100644
--- a/components/mus/public/cpp/tests/property_type_converters_unittest.cc
+++ b/components/mus/public/cpp/tests/property_type_converters_unittest.cc
@@ -31,7 +31,7 @@ SkBitmap MakeBitmap() {
 TEST(PropertyTypeConvertersTest, SkBitmapSerialize) {
   SkBitmap bitmap = MakeBitmap();
   std::vector<uint8_t> bytes =
-      TypeConverter<const std::vector<uint8_t>, SkBitmap>::Convert(bitmap);
+      TypeConverter<std::vector<uint8_t>, SkBitmap>::Convert(bitmap);
 
   // Size should be 4 bytes of header plus size of RGBA pixels.
   ASSERT_EQ(4 + bitmap.getSize(), bytes.size());
@@ -51,7 +51,7 @@ TEST(PropertyTypeConvertersTest, SkBitmapDeserialize) {
   // Make a 1x2 pixel bitmap.
   std::vector<uint8_t> bytes = {0, 1, 0, 2, 11, 22, 33, 44, 55, 66, 77, 88};
   SkBitmap bitmap =
-      TypeConverter<SkBitmap, const std::vector<uint8_t>>::Convert(bytes);
+      TypeConverter<SkBitmap, std::vector<uint8_t>>::Convert(bytes);
   EXPECT_EQ(1, bitmap.width());
   EXPECT_EQ(2, bitmap.height());
   // The image pixels match the vector bytes.
@@ -63,9 +63,9 @@ TEST(PropertyTypeConvertersTest, SkBitmapDeserialize) {
 TEST(PropertyTypeConvertersTest, SkBitmapRoundTrip) {
   SkBitmap bitmap1 = MakeBitmap();
   std::vector<uint8_t> bytes =
-      TypeConverter<const std::vector<uint8_t>, SkBitmap>::Convert(bitmap1);
+      TypeConverter<std::vector<uint8_t>, SkBitmap>::Convert(bitmap1);
   SkBitmap bitmap2 =
-      TypeConverter<SkBitmap, const std::vector<uint8_t>>::Convert(bytes);
+      TypeConverter<SkBitmap, std::vector<uint8_t>>::Convert(bytes);
   EXPECT_TRUE(gfx::BitmapsAreEqual(bitmap1, bitmap2));
 }
 
@@ -73,7 +73,7 @@ TEST(PropertyTypeConvertersTest, SkBitmapRoundTrip) {
 TEST(PropertyTypeConvertersTest, SkBitmapSerializeEmpty) {
   SkBitmap bitmap;
   std::vector<uint8_t> bytes =
-      TypeConverter<const std::vector<uint8_t>, SkBitmap>::Convert(bitmap);
+      TypeConverter<std::vector<uint8_t>, SkBitmap>::Convert(bitmap);
   EXPECT_TRUE(bytes.empty());
 }
 
@@ -81,7 +81,7 @@ TEST(PropertyTypeConvertersTest, SkBitmapSerializeEmpty) {
 TEST(PropertyTypeConvertersTest, SkBitmapDeserializeEmpty) {
   std::vector<uint8_t> bytes;
   SkBitmap bitmap =
-      TypeConverter<SkBitmap, const std::vector<uint8_t>>::Convert(bytes);
+      TypeConverter<SkBitmap, std::vector<uint8_t>>::Convert(bytes);
   EXPECT_TRUE(bitmap.isNull());
 }
 
diff --git a/components/mus/public/cpp/tests/window_tree_client_impl_unittest.cc b/components/mus/public/cpp/tests/window_tree_client_impl_unittest.cc
index 909c873..822354a 100644
--- a/components/mus/public/cpp/tests/window_tree_client_impl_unittest.cc
+++ b/components/mus/public/cpp/tests/window_tree_client_impl_unittest.cc
@@ -37,7 +37,7 @@ namespace mus {
 
 mojo::Array<uint8_t> Int32ToPropertyTransportValue(int32_t value) {
   const std::vector<uint8_t> bytes =
-      mojo::TypeConverter<const std::vector<uint8_t>, int32_t>::Convert(value);
+      mojo::ConvertTo<std::vector<uint8_t>>(value);
   mojo::Array<uint8_t> transport_value;
   transport_value.resize(bytes.size());
   memcpy(&transport_value.front(), &(bytes.front()), bytes.size());
diff --git a/components/mus/public/cpp/tests/window_unittest.cc b/components/mus/public/cpp/tests/window_unittest.cc
index 005bc57..dc51663 100644
--- a/components/mus/public/cpp/tests/window_unittest.cc
+++ b/components/mus/public/cpp/tests/window_unittest.cc
@@ -791,9 +791,7 @@ class SharedPropertyChangeObserver : public WindowObserver {
   std::string VectorToString(const std::vector<uint8_t>* data) {
     if (!data)
       return "NULL";
-    gfx::Size size =
-        mojo::TypeConverter<gfx::Size, const std::vector<uint8_t>>::Convert(
-            *data);
+    gfx::Size size = mojo::ConvertTo<gfx::Size>(*data);
     return base::StringPrintf("%d,%d", size.width(), size.height());
   }
 
diff --git a/components/mus/public/cpp/window_property.h b/components/mus/public/cpp/window_property.h
index d89a7b7..fafe416 100644
--- a/components/mus/public/cpp/window_property.h
+++ b/components/mus/public/cpp/window_property.h
@@ -47,7 +47,7 @@ namespace mus {
 template <typename T>
 void Window::SetSharedProperty(const std::string& name, const T& data) {
   const std::vector<uint8_t> bytes =
-      mojo::TypeConverter<const std::vector<uint8_t>, T>::Convert(data);
+      mojo::TypeConverter<std::vector<uint8_t>, T>::Convert(data);
   SetSharedPropertyInternal(name, &bytes);
 }
 
@@ -55,8 +55,7 @@ template <typename T>
 T Window::GetSharedProperty(const std::string& name) const {
   DCHECK(HasSharedProperty(name));
   auto it = properties_.find(name);
-  return mojo::TypeConverter<T, const std::vector<uint8_t>>::Convert(
-      it->second);
+  return mojo::TypeConverter<T, std::vector<uint8_t>>::Convert(it->second);
 }
 
 namespace {
diff --git a/mash/login/login.cc b/mash/login/login.cc
index 92dec1d..78cddd9 100644
--- a/mash/login/login.cc
+++ b/mash/login/login.cc
@@ -48,7 +48,7 @@ class UI : public views::WidgetDelegateView,
 
     std::map<std::string, std::vector<uint8_t>> properties;
     properties[mash::wm::mojom::kWindowContainer_Property] =
-        mojo::TypeConverter<const std::vector<uint8_t>, int32_t>::Convert(
+        mojo::ConvertTo<std::vector<uint8_t>>(
             static_cast<int32_t>(mash::wm::mojom::Container::LOGIN_WINDOWS));
     mus::Window* window =
         views::WindowManagerConnection::Get()->NewWindow(properties);
diff --git a/mash/screenlock/screenlock.cc b/mash/screenlock/screenlock.cc
index 310164d..10f3263 100644
--- a/mash/screenlock/screenlock.cc
+++ b/mash/screenlock/screenlock.cc
@@ -95,7 +95,7 @@ void Screenlock::Initialize(mojo::Connector* connector,
 
   std::map<std::string, std::vector<uint8_t>> properties;
   properties[mash::wm::mojom::kWindowContainer_Property] =
-      mojo::TypeConverter<const std::vector<uint8_t>, int32_t>::Convert(
+      mojo::ConvertTo<std::vector<uint8_t>>(
           static_cast<int32_t>(mash::wm::mojom::Container::LOGIN_WINDOWS));
   mus::Window* window =
       views::WindowManagerConnection::Get()->NewWindow(properties);
diff --git a/mash/wm/property_util.cc b/mash/wm/property_util.cc
index 5fa4931..a7d2797 100644
--- a/mash/wm/property_util.cc
+++ b/mash/wm/property_util.cc
@@ -112,8 +112,7 @@ mus::mojom::WindowType GetWindowType(
       properties.find(mus::mojom::WindowManager::kWindowType_Property);
   if (iter != properties.end()) {
     return static_cast<mus::mojom::WindowType>(
-        mojo::TypeConverter<int32_t, const std::vector<uint8_t>>::Convert(
-            iter->second));
+        mojo::ConvertTo<int32_t>(iter->second));
   }
   return mus::mojom::WindowType::POPUP;
 }
diff --git a/mash/wm/user_window_controller_impl.cc b/mash/wm/user_window_controller_impl.cc
index 3e81da94..30d347a 100644
--- a/mash/wm/user_window_controller_impl.cc
+++ b/mash/wm/user_window_controller_impl.cc
@@ -32,7 +32,7 @@ mojo::Array<uint8_t> GetWindowAppIcon(mus::Window* window) {
   if (window->HasSharedProperty(
           mus::mojom::WindowManager::kWindowAppIcon_Property)) {
     return mojo::Array<uint8_t>::From(
-        window->GetSharedProperty<const std::vector<uint8_t>>(
+        window->GetSharedProperty<std::vector<uint8_t>>(
             mus::mojom::WindowManager::kWindowAppIcon_Property));
   }
   return mojo::Array<uint8_t>();
diff --git a/ui/views/mus/native_widget_mus.cc b/ui/views/mus/native_widget_mus.cc
index 9b99d6b..48eb6d0 100644
--- a/ui/views/mus/native_widget_mus.cc
+++ b/ui/views/mus/native_widget_mus.cc
@@ -349,25 +349,22 @@ void NativeWidgetMus::ConfigurePropertiesForNewWindow(
     std::map<std::string, std::vector<uint8_t>>* properties) {
   if (!init_params.bounds.IsEmpty()) {
     (*properties)[mus::mojom::WindowManager::kUserSetBounds_Property] =
-        mojo::TypeConverter<const std::vector<uint8_t>, gfx::Rect>::Convert(
-            init_params.bounds);
+        mojo::ConvertTo<std::vector<uint8_t>>(init_params.bounds);
   }
 
   if (!Widget::RequiresNonClientView(init_params.type))
     return;
 
   (*properties)[mus::mojom::WindowManager::kWindowType_Property] =
-      mojo::TypeConverter<const std::vector<uint8_t>, int32_t>::Convert(
-          static_cast<int32_t>(
-              mojo::ConvertTo<mus::mojom::WindowType>(init_params.type)));
+      mojo::ConvertTo<std::vector<uint8_t>>(static_cast<int32_t>(
+          mojo::ConvertTo<mus::mojom::WindowType>(init_params.type)));
   (*properties)[mus::mojom::WindowManager::kResizeBehavior_Property] =
-      mojo::TypeConverter<const std::vector<uint8_t>, int32_t>::Convert(
+      mojo::ConvertTo<std::vector<uint8_t>>(
           ResizeBehaviorFromDelegate(init_params.delegate));
   SkBitmap app_icon = AppIconFromDelegate(init_params.delegate);
   if (!app_icon.isNull()) {
     (*properties)[mus::mojom::WindowManager::kWindowAppIcon_Property] =
-        mojo::TypeConverter<const std::vector<uint8_t>, SkBitmap>::Convert(
-            app_icon);
+        mojo::ConvertTo<std::vector<uint8_t>>(app_icon);
   }
 }