Use the default theme as the fallback UI in Blink

Most native themes don't support zooming or styling required by Blink.
This introduces a FallbackTheme that can be used in these situations.

Blink side change: https://codereview.chromium.org/14108007/

BUG=84973

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=200431

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=200785

Review URL: https://chromiumcodereview.appspot.com/14424007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@201085 0039d316-1c4b-4281-b951-d872f2087c98

5 files changed, 230 insertions, 171 deletions

diff --git a/ui/native_theme/fallback_theme.cc b/ui/native_theme/fallback_theme.cc
new file mode 100644
index 0000000..4bfe8d9
--- /dev/null
+++ b/ui/native_theme/fallback_theme.cc
@@ -0,0 +1,198 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/native_theme/fallback_theme.h"
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "ui/gfx/color_utils.h"
+#include "ui/gfx/skia_utils_gtk.h"
+#include "ui/native_theme/common_theme.h"
+
+namespace ui {
+
+FallbackTheme::FallbackTheme() {
+}
+
+FallbackTheme::~FallbackTheme() {
+}
+
+SkColor FallbackTheme::GetSystemColor(ColorId color_id) const {
+  // This implementation returns hardcoded colors.
+
+  static const SkColor kInvalidColorIdColor = SkColorSetRGB(255, 0, 128);
+  // Menu:
+  static const SkColor kMenuBackgroundColor = SK_ColorWHITE;
+  // Windows:
+  static const SkColor kWindowBackgroundColor = SK_ColorWHITE;
+  // Dialogs:
+  static const SkColor kDialogBackgroundColor = SkColorSetRGB(251, 251, 251);
+  // FocusableBorder:
+  static const SkColor kFocusedBorderColor = SkColorSetRGB(0x4D, 0x90, 0xFE);
+  static const SkColor kUnfocusedBorderColor = SkColorSetRGB(0xD9, 0xD9, 0xD9);
+  // Button:
+  static const SkColor kButtonBackgroundColor = SkColorSetRGB(0xDE, 0xDE, 0xDE);
+  static const SkColor kButtonEnabledColor = SkColorSetRGB(0x22, 0x22, 0x22);
+  static const SkColor kButtonDisabledColor = SkColorSetRGB(0x99, 0x99, 0x99);
+  static const SkColor kButtonHighlightColor = SkColorSetRGB(0, 0, 0);
+  static const SkColor kButtonHoverColor = kButtonEnabledColor;
+  // MenuItem:
+  static const SkColor kEnabledMenuItemForegroundColor = kButtonEnabledColor;
+  static const SkColor kDisabledMenuItemForegroundColor = kButtonDisabledColor;
+  static const SkColor kFocusedMenuItemBackgroundColor =
+      SkColorSetRGB(0xF1, 0xF1, 0xF1);
+  static const SkColor kHoverMenuItemBackgroundColor =
+      SkColorSetARGB(204, 255, 255, 255);
+  static const SkColor kMenuSeparatorColor = SkColorSetRGB(0xED, 0xED, 0xED);
+  static const SkColor kEnabledMenuButtonBorderColor =
+      SkColorSetARGB(36, 0, 0, 0);
+  static const SkColor kFocusedMenuButtonBorderColor =
+      SkColorSetARGB(72, 0, 0, 0);
+  static const SkColor kHoverMenuButtonBorderColor =
+      SkColorSetARGB(72, 0, 0, 0);
+  // Label:
+  static const SkColor kLabelEnabledColor = kButtonEnabledColor;
+  static const SkColor kLabelDisabledColor = kButtonDisabledColor;
+  static const SkColor kLabelBackgroundColor = SK_ColorWHITE;
+  // Textfield:
+  static const SkColor kTextfieldDefaultColor = SK_ColorBLACK;
+  static const SkColor kTextfieldDefaultBackground = SK_ColorWHITE;
+  static const SkColor kTextfieldReadOnlyColor = SK_ColorDKGRAY;
+  static const SkColor kTextfieldReadOnlyBackground = SK_ColorWHITE;
+  static const SkColor kTextfieldSelectionBackgroundFocused =
+      SkColorSetARGB(0x54, 0x60, 0xA8, 0xEB);
+  static const SkColor kTextfieldSelectionBackgroundUnfocused = SK_ColorLTGRAY;
+  static const SkColor kTextfieldSelectionColor =
+      color_utils::AlphaBlend(SK_ColorBLACK,
+          kTextfieldSelectionBackgroundFocused, 0xdd);
+  // Tree
+  static const SkColor kTreeBackground = SK_ColorWHITE;
+  static const SkColor kTreeTextColor = SK_ColorBLACK;
+  static const SkColor kTreeSelectedTextColor = SK_ColorBLACK;
+  static const SkColor kTreeSelectionBackgroundColor =
+      SkColorSetRGB(0xEE, 0xEE, 0xEE);
+  static const SkColor kTreeArrowColor = SkColorSetRGB(0x7A, 0x7A, 0x7A);
+  // Table
+  static const SkColor kTableBackground = SK_ColorWHITE;
+  static const SkColor kTableTextColor = SK_ColorBLACK;
+  static const SkColor kTableSelectedTextColor = SK_ColorBLACK;
+  static const SkColor kTableSelectionBackgroundColor =
+      SkColorSetRGB(0xEE, 0xEE, 0xEE);
+  static const SkColor kTableGroupingIndicatorColor =
+      SkColorSetRGB(0xCC, 0xCC, 0xCC);
+
+  SkColor color;
+  if (CommonThemeGetSystemColor(color_id, &color))
+    return color;
+
+  switch (color_id) {
+    // Windows
+    case kColorId_WindowBackground:
+      return kWindowBackgroundColor;
+
+    // Dialogs
+    case kColorId_DialogBackground:
+      return kDialogBackgroundColor;
+
+    // FocusableBorder
+    case kColorId_FocusedBorderColor:
+      return kFocusedBorderColor;
+    case kColorId_UnfocusedBorderColor:
+      return kUnfocusedBorderColor;
+
+    // Button
+    case kColorId_ButtonBackgroundColor:
+      return kButtonBackgroundColor;
+    case kColorId_ButtonEnabledColor:
+      return kButtonEnabledColor;
+    case kColorId_ButtonDisabledColor:
+      return kButtonDisabledColor;
+    case kColorId_ButtonHighlightColor:
+      return kButtonHighlightColor;
+    case kColorId_ButtonHoverColor:
+      return kButtonHoverColor;
+
+    // MenuItem
+    case kColorId_EnabledMenuItemForegroundColor:
+      return kEnabledMenuItemForegroundColor;
+    case kColorId_DisabledMenuItemForegroundColor:
+      return kDisabledMenuItemForegroundColor;
+    case kColorId_SelectedMenuItemForegroundColor:
+      return kEnabledMenuItemForegroundColor;
+    case kColorId_FocusedMenuItemBackgroundColor:
+      return kFocusedMenuItemBackgroundColor;
+    case kColorId_HoverMenuItemBackgroundColor:
+      return kHoverMenuItemBackgroundColor;
+    case kColorId_MenuSeparatorColor:
+      return kMenuSeparatorColor;
+    case kColorId_EnabledMenuButtonBorderColor:
+      return kEnabledMenuButtonBorderColor;
+    case kColorId_FocusedMenuButtonBorderColor:
+      return kFocusedMenuButtonBorderColor;
+    case kColorId_HoverMenuButtonBorderColor:
+      return kHoverMenuButtonBorderColor;
+
+    // Label
+    case kColorId_LabelEnabledColor:
+      return kLabelEnabledColor;
+    case kColorId_LabelDisabledColor:
+      return kLabelDisabledColor;
+    case kColorId_LabelBackgroundColor:
+      return kLabelBackgroundColor;
+
+    // Textfield
+    case kColorId_TextfieldDefaultColor:
+      return kTextfieldDefaultColor;
+    case kColorId_TextfieldDefaultBackground:
+      return kTextfieldDefaultBackground;
+    case kColorId_TextfieldReadOnlyColor:
+      return kTextfieldReadOnlyColor;
+    case kColorId_TextfieldReadOnlyBackground:
+      return kTextfieldReadOnlyBackground;
+    case kColorId_TextfieldSelectionColor:
+      return kTextfieldSelectionColor;
+    case kColorId_TextfieldSelectionBackgroundFocused:
+      return kTextfieldSelectionBackgroundFocused;
+    case kColorId_TextfieldSelectionBackgroundUnfocused:
+      return kTextfieldSelectionBackgroundUnfocused;
+
+    // Tree
+    case kColorId_TreeBackground:
+      return kTreeBackground;
+    case kColorId_TreeText:
+      return kTreeTextColor;
+    case kColorId_TreeSelectedText:
+    case kColorId_TreeSelectedTextUnfocused:
+      return kTreeSelectedTextColor;
+    case kColorId_TreeSelectionBackgroundFocused:
+    case kColorId_TreeSelectionBackgroundUnfocused:
+      return kTreeSelectionBackgroundColor;
+    case kColorId_TreeArrow:
+      return kTreeArrowColor;
+
+    // Table
+    case kColorId_TableBackground:
+      return kTableBackground;
+    case kColorId_TableText:
+      return kTableTextColor;
+    case kColorId_TableSelectedText:
+    case kColorId_TableSelectedTextUnfocused:
+      return kTableSelectedTextColor;
+    case kColorId_TableSelectionBackgroundFocused:
+    case kColorId_TableSelectionBackgroundUnfocused:
+      return kTableSelectionBackgroundColor;
+    case kColorId_TableGroupingIndicatorColor:
+      return kTableGroupingIndicatorColor;
+
+    case kColorId_MenuBackgroundColor:
+      return kMenuBackgroundColor;
+    case kColorId_MenuBorderColor:
+      NOTREACHED();
+      break;
+  }
+
+  return kInvalidColorIdColor;
+}
+
+}  // namespace ui
diff --git a/ui/native_theme/fallback_theme.h b/ui/native_theme/fallback_theme.h
new file mode 100644
index 0000000..2a69936
--- /dev/null
+++ b/ui/native_theme/fallback_theme.h
@@ -0,0 +1,28 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_NATIVE_THEME_FALLBACK_THEME_H_
+#define UI_NATIVE_THEME_FALLBACK_THEME_H_
+
+#include "ui/native_theme/native_theme_base.h"
+
+namespace ui {
+
+// This theme can draw UI controls on every platform. This is only used when
+// zooming a web page and the native theme doesn't support scaling.
+class NATIVE_THEME_EXPORT FallbackTheme : public NativeThemeBase {
+ public:
+  FallbackTheme();
+  virtual ~FallbackTheme();
+
+ private:
+  // Overridden from NativeThemeBase:
+  virtual SkColor GetSystemColor(ColorId color_id) const OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(FallbackTheme);
+};
+
+}  // namespace ui
+
+#endif  // UI_NATIVE_THEME_FALLBACK_THEME_H_
diff --git a/ui/native_theme/native_theme.gyp b/ui/native_theme/native_theme.gyp
index 70d27a3..671f286 100644
--- a/ui/native_theme/native_theme.gyp
+++ b/ui/native_theme/native_theme.gyp
@@ -23,6 +23,8 @@
       'sources': [
         'common_theme.cc',
         'common_theme.h',
+        'fallback_theme.cc',
+        'fallback_theme.h',
         'native_theme.cc',
         'native_theme.h',
         'native_theme_android.cc',
diff --git a/ui/native_theme/native_theme_aura.cc b/ui/native_theme/native_theme_aura.cc
index 8d7ae0b..6cbc255 100644
--- a/ui/native_theme/native_theme_aura.cc
+++ b/ui/native_theme/native_theme_aura.cc
@@ -19,59 +19,6 @@ namespace {
 
 const SkColor kMenuBackgroundColor = SK_ColorWHITE;
 
-// Theme colors returned by GetSystemColor().
-const SkColor kInvalidColorIdColor = SkColorSetRGB(255, 0, 128);
-// Windows:
-const SkColor kWindowBackgroundColor = SK_ColorWHITE;
-// Dialogs:
-const SkColor kDialogBackgroundColor = SkColorSetRGB(251, 251, 251);
-// FocusableBorder:
-const SkColor kFocusedBorderColor = SkColorSetRGB(0x4D, 0x90, 0xFE);
-const SkColor kUnfocusedBorderColor = SkColorSetRGB(0xD9, 0xD9, 0xD9);
-// Button:
-const SkColor kButtonBackgroundColor = SkColorSetRGB(0xDE, 0xDE, 0xDE);
-const SkColor kButtonEnabledColor = SkColorSetRGB(0x22, 0x22, 0x22);
-const SkColor kButtonDisabledColor = SkColorSetRGB(0x99, 0x99, 0x99);
-const SkColor kButtonHighlightColor = SkColorSetRGB(0, 0, 0);
-const SkColor kButtonHoverColor = kButtonEnabledColor;
-// MenuItem:
-const SkColor kEnabledMenuItemForegroundColor = kButtonEnabledColor;
-const SkColor kDisabledMenuItemForegroundColor = kButtonDisabledColor;
-const SkColor kFocusedMenuItemBackgroundColor = SkColorSetRGB(0xF1, 0xF1, 0xF1);
-const SkColor kHoverMenuItemBackgroundColor =
-    SkColorSetARGB(204, 255, 255, 255);
-const SkColor kMenuSeparatorColor = SkColorSetRGB(0xED, 0xED, 0xED);
-const SkColor kEnabledMenuButtonBorderColor = SkColorSetARGB(36, 0, 0, 0);
-const SkColor kFocusedMenuButtonBorderColor = SkColorSetARGB(72, 0, 0, 0);
-const SkColor kHoverMenuButtonBorderColor = SkColorSetARGB(72, 0, 0, 0);
-// Label:
-const SkColor kLabelEnabledColor = kButtonEnabledColor;
-const SkColor kLabelDisabledColor = kButtonDisabledColor;
-const SkColor kLabelBackgroundColor = SK_ColorWHITE;
-// Textfield:
-const SkColor kTextfieldDefaultColor = SK_ColorBLACK;
-const SkColor kTextfieldDefaultBackground = SK_ColorWHITE;
-const SkColor kTextfieldReadOnlyColor = SK_ColorDKGRAY;
-const SkColor kTextfieldReadOnlyBackground = SK_ColorWHITE;
-const SkColor kTextfieldSelectionBackgroundFocused =
-    SkColorSetARGB(0x54, 0x60, 0xA8, 0xEB);
-const SkColor kTextfieldSelectionBackgroundUnfocused = SK_ColorLTGRAY;
-const SkColor kTextfieldSelectionColor =
-    color_utils::AlphaBlend(SK_ColorBLACK,
-        kTextfieldSelectionBackgroundFocused, 0xdd);
-// Tree
-const SkColor kTreeBackground = SK_ColorWHITE;
-const SkColor kTreeTextColor = SK_ColorBLACK;
-const SkColor kTreeSelectedTextColor = SK_ColorBLACK;
-const SkColor kTreeSelectionBackgroundColor = SkColorSetRGB(0xEE, 0xEE, 0xEE);
-const SkColor kTreeArrowColor = SkColorSetRGB(0x7A, 0x7A, 0x7A);
-// Table
-const SkColor kTableBackground = SK_ColorWHITE;
-const SkColor kTableTextColor = SK_ColorBLACK;
-const SkColor kTableSelectedTextColor = SK_ColorBLACK;
-const SkColor kTableSelectionBackgroundColor = SkColorSetRGB(0xEE, 0xEE, 0xEE);
-const SkColor kTableGroupingIndicatorColor = SkColorSetRGB(0xCC, 0xCC, 0xCC);
-
 }  // namespace
 
 namespace ui {
@@ -95,121 +42,6 @@ NativeThemeAura::NativeThemeAura() {
 NativeThemeAura::~NativeThemeAura() {
 }
 
-SkColor NativeThemeAura::GetSystemColor(ColorId color_id) const {
-  // This implementation returns hardcoded colors.
-  SkColor color;
-  if (CommonThemeGetSystemColor(color_id, &color))
-    return color;
-
-  switch (color_id) {
-    // Windows
-    case kColorId_WindowBackground:
-      return kWindowBackgroundColor;
-
-    // Dialogs
-    case kColorId_DialogBackground:
-      return kDialogBackgroundColor;
-
-    // FocusableBorder
-    case kColorId_FocusedBorderColor:
-      return kFocusedBorderColor;
-    case kColorId_UnfocusedBorderColor:
-      return kUnfocusedBorderColor;
-
-    // Button
-    case kColorId_ButtonBackgroundColor:
-      return kButtonBackgroundColor;
-    case kColorId_ButtonEnabledColor:
-      return kButtonEnabledColor;
-    case kColorId_ButtonDisabledColor:
-      return kButtonDisabledColor;
-    case kColorId_ButtonHighlightColor:
-      return kButtonHighlightColor;
-    case kColorId_ButtonHoverColor:
-      return kButtonHoverColor;
-
-    // MenuItem
-    case kColorId_EnabledMenuItemForegroundColor:
-      return kEnabledMenuItemForegroundColor;
-    case kColorId_DisabledMenuItemForegroundColor:
-      return kDisabledMenuItemForegroundColor;
-    case kColorId_SelectedMenuItemForegroundColor:
-      return kEnabledMenuItemForegroundColor;
-    case kColorId_FocusedMenuItemBackgroundColor:
-      return kFocusedMenuItemBackgroundColor;
-    case kColorId_HoverMenuItemBackgroundColor:
-      return kHoverMenuItemBackgroundColor;
-    case kColorId_MenuSeparatorColor:
-      return kMenuSeparatorColor;
-    case kColorId_EnabledMenuButtonBorderColor:
-      return kEnabledMenuButtonBorderColor;
-    case kColorId_FocusedMenuButtonBorderColor:
-      return kFocusedMenuButtonBorderColor;
-    case kColorId_HoverMenuButtonBorderColor:
-      return kHoverMenuButtonBorderColor;
-
-    // Label
-    case kColorId_LabelEnabledColor:
-      return kLabelEnabledColor;
-    case kColorId_LabelDisabledColor:
-      return kLabelDisabledColor;
-    case kColorId_LabelBackgroundColor:
-      return kLabelBackgroundColor;
-
-    // Textfield
-    case kColorId_TextfieldDefaultColor:
-      return kTextfieldDefaultColor;
-    case kColorId_TextfieldDefaultBackground:
-      return kTextfieldDefaultBackground;
-    case kColorId_TextfieldReadOnlyColor:
-      return kTextfieldReadOnlyColor;
-    case kColorId_TextfieldReadOnlyBackground:
-      return kTextfieldReadOnlyBackground;
-    case kColorId_TextfieldSelectionColor:
-      return kTextfieldSelectionColor;
-    case kColorId_TextfieldSelectionBackgroundFocused:
-      return kTextfieldSelectionBackgroundFocused;
-    case kColorId_TextfieldSelectionBackgroundUnfocused:
-      return kTextfieldSelectionBackgroundUnfocused;
-
-    // Tree
-    case kColorId_TreeBackground:
-      return kTreeBackground;
-    case kColorId_TreeText:
-      return kTreeTextColor;
-    case kColorId_TreeSelectedText:
-    case kColorId_TreeSelectedTextUnfocused:
-      return kTreeSelectedTextColor;
-    case kColorId_TreeSelectionBackgroundFocused:
-    case kColorId_TreeSelectionBackgroundUnfocused:
-      return kTreeSelectionBackgroundColor;
-    case kColorId_TreeArrow:
-      return kTreeArrowColor;
-
-    // Table
-    case kColorId_TableBackground:
-      return kTableBackground;
-    case kColorId_TableText:
-      return kTableTextColor;
-    case kColorId_TableSelectedText:
-    case kColorId_TableSelectedTextUnfocused:
-      return kTableSelectedTextColor;
-    case kColorId_TableSelectionBackgroundFocused:
-    case kColorId_TableSelectionBackgroundUnfocused:
-      return kTableSelectionBackgroundColor;
-    case kColorId_TableGroupingIndicatorColor:
-      return kTableGroupingIndicatorColor;
-
-    case kColorId_MenuBackgroundColor:
-      return kMenuBackgroundColor;
-    case kColorId_MenuBorderColor:
-      NOTREACHED();
-      break;
-  }
-
-  return kInvalidColorIdColor;
-}
-
 void NativeThemeAura::PaintMenuPopupBackground(
     SkCanvas* canvas,
     const gfx::Size& size,
diff --git a/ui/native_theme/native_theme_aura.h b/ui/native_theme/native_theme_aura.h
index 51ebd38..b3417b3 100644
--- a/ui/native_theme/native_theme_aura.h
+++ b/ui/native_theme/native_theme_aura.h
@@ -7,12 +7,12 @@
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
-#include "ui/native_theme/native_theme_base.h"
+#include "ui/native_theme/fallback_theme.h"
 
 namespace ui {
 
 // Aura implementation of native theme support.
-class NATIVE_THEME_EXPORT NativeThemeAura : public NativeThemeBase {
+class NATIVE_THEME_EXPORT NativeThemeAura : public FallbackTheme {
  public:
   static NativeThemeAura* instance();
 
@@ -21,7 +21,6 @@ class NATIVE_THEME_EXPORT NativeThemeAura : public NativeThemeBase {
   virtual ~NativeThemeAura();
 
   // Overridden from NativeThemeBase:
-  virtual SkColor GetSystemColor(ColorId color_id) const OVERRIDE;
   virtual void PaintMenuPopupBackground(
       SkCanvas* canvas,
       const gfx::Size& size,