Convert FormatBytes to string16.

I considered ASCII, but it's producing what is intended to be a
human-readable string.  For example, in theory the "bytes/s" annotation
could be localized into a language where the "b" is non-ASCII.

Review URL: http://codereview.chromium.org/3107021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@56603 0039d316-1c4b-4281-b951-d872f2087c98

10 files changed, 78 insertions, 79 deletions

diff --git a/base/string_util.cc b/base/string_util.cc
index 917d9a9..4dbcd7b 100644
--- a/base/string_util.cc
+++ b/base/string_util.cc
@@ -652,27 +652,27 @@ DataUnits GetByteDisplayUnits(int64 bytes) {
 
 // TODO(mpcomplete): deal with locale
 // Byte suffixes.  This must match the DataUnits enum.
-static const wchar_t* const kByteStrings[] = {
-  L"B",
-  L"kB",
-  L"MB",
-  L"GB"
+static const char* const kByteStrings[] = {
+  "B",
+  "kB",
+  "MB",
+  "GB"
 };
 
-static const wchar_t* const kSpeedStrings[] = {
-  L"B/s",
-  L"kB/s",
-  L"MB/s",
-  L"GB/s"
+static const char* const kSpeedStrings[] = {
+  "B/s",
+  "kB/s",
+  "MB/s",
+  "GB/s"
 };
 
-std::wstring FormatBytesInternal(int64 bytes,
-                                 DataUnits units,
-                                 bool show_units,
-                                 const wchar_t* const* suffix) {
+string16 FormatBytesInternal(int64 bytes,
+                             DataUnits units,
+                             bool show_units,
+                             const char* const* suffix) {
   if (bytes < 0) {
     NOTREACHED() << "Negative bytes value";
-    return std::wstring();
+    return string16();
   }
 
   DCHECK(units >= DATA_UNITS_BYTE && units <= DATA_UNITS_GIBIBYTE);
@@ -682,26 +682,26 @@ std::wstring FormatBytesInternal(int64 bytes,
   for (int i = 0; i < units; ++i)
     unit_amount /= 1024.0;
 
-  wchar_t buf[64];
+  char buf[64];
   if (bytes != 0 && units != DATA_UNITS_BYTE && unit_amount < 100)
-    base::swprintf(buf, arraysize(buf), L"%.1lf", unit_amount);
+    base::snprintf(buf, arraysize(buf), "%.1lf", unit_amount);
   else
-    base::swprintf(buf, arraysize(buf), L"%.0lf", unit_amount);
+    base::snprintf(buf, arraysize(buf), "%.0lf", unit_amount);
 
-  std::wstring ret(buf);
+  std::string ret(buf);
   if (show_units) {
-    ret += L" ";
+    ret += " ";
     ret += suffix[units];
   }
 
-  return ret;
+  return ASCIIToUTF16(ret);
 }
 
-std::wstring FormatBytes(int64 bytes, DataUnits units, bool show_units) {
+string16 FormatBytes(int64 bytes, DataUnits units, bool show_units) {
   return FormatBytesInternal(bytes, units, show_units, kByteStrings);
 }
 
-std::wstring FormatSpeed(int64 bytes, DataUnits units, bool show_units) {
+string16 FormatSpeed(int64 bytes, DataUnits units, bool show_units) {
   return FormatBytesInternal(bytes, units, show_units, kSpeedStrings);
 }
 
diff --git a/base/string_util.h b/base/string_util.h
index c69b2de..4419b79 100644
--- a/base/string_util.h
+++ b/base/string_util.h
@@ -417,16 +417,16 @@ DataUnits GetByteDisplayUnits(int64 bytes);
 // specified by 'units', with an optional unit suffix.
 // Ex: FormatBytes(512, DATA_UNITS_KIBIBYTE, true) => "0.5 KB"
 // Ex: FormatBytes(10*1024, DATA_UNITS_MEBIBYTE, false) => "0.1"
-std::wstring FormatBytes(int64 bytes, DataUnits units, bool show_units);
+string16 FormatBytes(int64 bytes, DataUnits units, bool show_units);
 
 // As above, but with "/s" units.
 // Ex: FormatSpeed(512, DATA_UNITS_KIBIBYTE, true) => "0.5 KB/s"
 // Ex: FormatSpeed(10*1024, DATA_UNITS_MEBIBYTE, false) => "0.1"
-std::wstring FormatSpeed(int64 bytes, DataUnits units, bool show_units);
+string16 FormatSpeed(int64 bytes, DataUnits units, bool show_units);
 
 // Return a number formated with separators in the user's locale way.
 // Ex: FormatNumber(1234567) => 1,234,567
-std::wstring FormatNumber(int64 number);
+string16 FormatNumber(int64 number);
 
 // Starting at |start_offset| (usually 0), replace the first instance of
 // |find_this| with |replace_with|.
diff --git a/base/string_util_unittest.cc b/base/string_util_unittest.cc
index 9f72b1f..8a8fc39 100644
--- a/base/string_util_unittest.cc
+++ b/base/string_util_unittest.cc
@@ -530,8 +530,8 @@ TEST(StringUtilTest, FormatBytes) {
   static const struct {
     int64 bytes;
     DataUnits units;
-    const wchar_t* expected;
-    const wchar_t* expected_with_units;
+    const char* expected;
+    const char* expected_with_units;
   } cases[] = {
     // Expected behavior: we show one post-decimal digit when we have
     // under two pre-decimal digits, except in cases where it makes no
@@ -539,35 +539,35 @@ TEST(StringUtilTest, FormatBytes) {
     // Since we switch units once we cross the 1000 mark, this keeps
     // the display of file sizes or bytes consistently around three
     // digits.
-    {0, DATA_UNITS_BYTE, L"0", L"0 B"},
-    {512, DATA_UNITS_BYTE, L"512", L"512 B"},
-    {512, DATA_UNITS_KIBIBYTE, L"0.5", L"0.5 kB"},
-    {1024*1024, DATA_UNITS_KIBIBYTE, L"1024", L"1024 kB"},
-    {1024*1024, DATA_UNITS_MEBIBYTE, L"1.0", L"1.0 MB"},
-    {1024*1024*1024, DATA_UNITS_GIBIBYTE, L"1.0", L"1.0 GB"},
-    {10LL*1024*1024*1024, DATA_UNITS_GIBIBYTE, L"10.0", L"10.0 GB"},
-    {99LL*1024*1024*1024, DATA_UNITS_GIBIBYTE, L"99.0", L"99.0 GB"},
-    {105LL*1024*1024*1024, DATA_UNITS_GIBIBYTE, L"105", L"105 GB"},
+    {0, DATA_UNITS_BYTE, "0", "0 B"},
+    {512, DATA_UNITS_BYTE, "512", "512 B"},
+    {512, DATA_UNITS_KIBIBYTE, "0.5", "0.5 kB"},
+    {1024*1024, DATA_UNITS_KIBIBYTE, "1024", "1024 kB"},
+    {1024*1024, DATA_UNITS_MEBIBYTE, "1.0", "1.0 MB"},
+    {1024*1024*1024, DATA_UNITS_GIBIBYTE, "1.0", "1.0 GB"},
+    {10LL*1024*1024*1024, DATA_UNITS_GIBIBYTE, "10.0", "10.0 GB"},
+    {99LL*1024*1024*1024, DATA_UNITS_GIBIBYTE, "99.0", "99.0 GB"},
+    {105LL*1024*1024*1024, DATA_UNITS_GIBIBYTE, "105", "105 GB"},
     {105LL*1024*1024*1024 + 500LL*1024*1024, DATA_UNITS_GIBIBYTE,
-     L"105", L"105 GB"},
-    {~(1LL<<63), DATA_UNITS_GIBIBYTE, L"8589934592", L"8589934592 GB"},
+     "105", "105 GB"},
+    {~(1LL<<63), DATA_UNITS_GIBIBYTE, "8589934592", "8589934592 GB"},
 
-    {99*1024 + 103, DATA_UNITS_KIBIBYTE, L"99.1", L"99.1 kB"},
-    {1024*1024 + 103, DATA_UNITS_KIBIBYTE, L"1024", L"1024 kB"},
-    {1024*1024 + 205 * 1024, DATA_UNITS_MEBIBYTE, L"1.2", L"1.2 MB"},
+    {99*1024 + 103, DATA_UNITS_KIBIBYTE, "99.1", "99.1 kB"},
+    {1024*1024 + 103, DATA_UNITS_KIBIBYTE, "1024", "1024 kB"},
+    {1024*1024 + 205 * 1024, DATA_UNITS_MEBIBYTE, "1.2", "1.2 MB"},
     {1024*1024*1024 + (927 * 1024*1024), DATA_UNITS_GIBIBYTE,
-     L"1.9", L"1.9 GB"},
-    {10LL*1024*1024*1024, DATA_UNITS_GIBIBYTE, L"10.0", L"10.0 GB"},
-    {100LL*1024*1024*1024, DATA_UNITS_GIBIBYTE, L"100", L"100 GB"},
+     "1.9", "1.9 GB"},
+    {10LL*1024*1024*1024, DATA_UNITS_GIBIBYTE, "10.0", "10.0 GB"},
+    {100LL*1024*1024*1024, DATA_UNITS_GIBIBYTE, "100", "100 GB"},
 #ifdef NDEBUG
-    {-1, DATA_UNITS_BYTE, L"", L""},
+    {-1, DATA_UNITS_BYTE, "", ""},
 #endif
   };
 
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(cases); ++i) {
-    EXPECT_EQ(cases[i].expected,
+    EXPECT_EQ(ASCIIToUTF16(cases[i].expected),
               FormatBytes(cases[i].bytes, cases[i].units, false));
-    EXPECT_EQ(cases[i].expected_with_units,
+    EXPECT_EQ(ASCIIToUTF16(cases[i].expected_with_units),
               FormatBytes(cases[i].bytes, cases[i].units, true));
   }
 }
diff --git a/chrome/browser/diagnostics/recon_diagnostics.cc b/chrome/browser/diagnostics/recon_diagnostics.cc
index eb76c2b..bbe23f7 100644
--- a/chrome/browser/diagnostics/recon_diagnostics.cc
+++ b/chrome/browser/diagnostics/recon_diagnostics.cc
@@ -203,8 +203,7 @@ class PathTest : public DiagnosticTest {
       return true;
     }
     DataUnits units = GetByteDisplayUnits(dir_or_file_size);
-    string16 printable_size =
-        WideToUTF16(FormatBytes(dir_or_file_size, units, true));
+    string16 printable_size = FormatBytes(dir_or_file_size, units, true);
 
     if (path_info_.max_size > 0) {
       if (dir_or_file_size > path_info_.max_size) {
@@ -248,8 +247,7 @@ class DiskSpaceTest : public DiagnosticTest {
       return true;
     }
     DataUnits units = GetByteDisplayUnits(disk_space);
-    string16 printable_size =
-        WideToUTF16(FormatBytes(disk_space, units, true));
+    string16 printable_size = FormatBytes(disk_space, units, true);
     if (disk_space < 80 * kOneMeg) {
       RecordFailure(ASCIIToUTF16("Low disk space : ") + printable_size);
       return true;
diff --git a/chrome/browser/download/download_item_model.cc b/chrome/browser/download/download_item_model.cc
index c360273..48c75ad 100644
--- a/chrome/browser/download/download_item_model.cc
+++ b/chrome/browser/download/download_item_model.cc
@@ -32,17 +32,15 @@ std::wstring DownloadItemModel::GetStatusText() {
   int64 total = download_->total_bytes();
 
   DataUnits amount_units = GetByteDisplayUnits(total);
-  const string16 simple_size = WideToUTF16Hack(FormatBytes(size, amount_units,
-                                                           false));
+  const string16 simple_size = FormatBytes(size, amount_units, false);
 
   // In RTL locales, we render the text "size/total" in an RTL context. This
   // is problematic since a string such as "123/456 MB" is displayed
   // as "MB 123/456" because it ends with an LTR run. In order to solve this,
   // we mark the total string as an LTR string if the UI layout is
   // right-to-left so that the string "456 MB" is treated as an LTR run.
-  string16 simple_total = WideToUTF16Hack(FormatBytes(total, amount_units,
-                                                      true));
-  simple_total = base::i18n::GetDisplayStringInLTRDirectionality(simple_total);
+  string16 simple_total = base::i18n::GetDisplayStringInLTRDirectionality(
+      FormatBytes(total, amount_units, true));
 
   TimeDelta remaining;
   string16 simple_time;
@@ -71,8 +69,7 @@ std::wstring DownloadItemModel::GetStatusText() {
           // Instead of displaying "0 B" we keep the "Starting..." string.
           status_text = (size == 0) ?
               l10n_util::GetStringUTF16(IDS_DOWNLOAD_STATUS_STARTING) :
-              WideToUTF16Hack(FormatBytes(size, GetByteDisplayUnits(size),
-                                          true));
+              FormatBytes(size, GetByteDisplayUnits(size), true);
         } else {
           status_text = l10n_util::GetStringFUTF16(
               IDS_DOWNLOAD_STATUS_IN_PROGRESS, simple_size, simple_total,
diff --git a/chrome/browser/download/download_util.cc b/chrome/browser/download/download_util.cc
index e76bf6e..e7f75c9 100644
--- a/chrome/browser/download/download_util.cc
+++ b/chrome/browser/download/download_util.cc
@@ -591,7 +591,8 @@ std::wstring GetProgressStatusText(DownloadItem* download) {
   int64 total = download->total_bytes();
   int64 size = download->received_bytes();
   DataUnits amount_units = GetByteDisplayUnits(size);
-  std::wstring received_size = FormatBytes(size, amount_units, true);
+  std::wstring received_size = UTF16ToWideHack(FormatBytes(size, amount_units,
+                                                           true));
   std::wstring amount = received_size;
 
   // Adjust both strings for the locale direction since we don't yet know which
@@ -604,7 +605,8 @@ std::wstring GetProgressStatusText(DownloadItem* download) {
 
   if (total) {
     amount_units = GetByteDisplayUnits(total);
-    std::wstring total_text = FormatBytes(total, amount_units, true);
+    std::wstring total_text =
+        UTF16ToWideHack(FormatBytes(total, amount_units, true));
     std::wstring total_text_localized;
     if (base::i18n::AdjustStringForLocaleDirection(total_text,
                                                    &total_text_localized))
@@ -617,8 +619,9 @@ std::wstring GetProgressStatusText(DownloadItem* download) {
     amount.assign(received_size);
   }
   amount_units = GetByteDisplayUnits(download->CurrentSpeed());
-  std::wstring speed_text = FormatSpeed(download->CurrentSpeed(),
-                                        amount_units, true);
+  std::wstring speed_text =
+      UTF16ToWideHack(FormatSpeed(download->CurrentSpeed(), amount_units,
+                                  true));
   std::wstring speed_text_localized;
   if (base::i18n::AdjustStringForLocaleDirection(speed_text,
                                                  &speed_text_localized))
diff --git a/chrome/browser/gtk/gtk_chrome_cookie_view.cc b/chrome/browser/gtk/gtk_chrome_cookie_view.cc
index 359cdca..5ecba7e 100644
--- a/chrome/browser/gtk/gtk_chrome_cookie_view.cc
+++ b/chrome/browser/gtk/gtk_chrome_cookie_view.cc
@@ -512,7 +512,7 @@ void gtk_chrome_cookie_view_display_database(
   gtk_entry_set_text(GTK_ENTRY(self->database_description_entry_),
                      database_info.description.c_str());
   gtk_entry_set_text(GTK_ENTRY(self->database_size_entry_),
-                     WideToUTF8(FormatBytes(
+                     UTF16ToUTF8(FormatBytes(
                          database_info.size,
                          GetByteDisplayUnits(database_info.size),
                          true)).c_str());
@@ -532,7 +532,7 @@ void gtk_chrome_cookie_view_display_local_storage(
   gtk_entry_set_text(GTK_ENTRY(self->local_storage_origin_entry_),
                      local_storage_info.origin.c_str());
   gtk_entry_set_text(GTK_ENTRY(self->local_storage_size_entry_),
-                     WideToUTF8(FormatBytes(
+                     UTF16ToUTF8(FormatBytes(
                          local_storage_info.size,
                          GetByteDisplayUnits(local_storage_info.size),
                          true)).c_str());
@@ -551,7 +551,7 @@ void gtk_chrome_cookie_view_display_app_cache(
   gtk_entry_set_text(GTK_ENTRY(self->appcache_manifest_entry_),
                      info.manifest_url.spec().c_str());
   gtk_entry_set_text(GTK_ENTRY(self->appcache_size_entry_),
-                     WideToUTF8(FormatBytes(
+                     UTF16ToUTF8(FormatBytes(
                          info.size,
                          GetByteDisplayUnits(info.size),
                          true)).c_str());
@@ -595,7 +595,7 @@ void gtk_chrome_cookie_view_display_database_accessed(
   gtk_entry_set_text(GTK_ENTRY(self->database_accessed_description_entry_),
                      UTF16ToUTF8(display_name).c_str());
   gtk_entry_set_text(GTK_ENTRY(self->database_accessed_size_entry_),
-                     WideToUTF8(FormatBytes(
+                     UTF16ToUTF8(FormatBytes(
                          estimated_size,
                          GetByteDisplayUnits(estimated_size),
                          true)).c_str());
diff --git a/chrome/browser/task_manager.cc b/chrome/browser/task_manager.cc
index fb236e3..f8ffc10 100644
--- a/chrome/browser/task_manager.cc
+++ b/chrome/browser/task_manager.cc
@@ -59,8 +59,8 @@ int ValueCompare(T value1, T value2) {
 
 string16 FormatStatsSize(const WebKit::WebCache::ResourceTypeStat& stat) {
   return l10n_util::GetStringFUTF16(IDS_TASK_MANAGER_CACHE_SIZE_CELL_TEXT,
-      WideToUTF16Hack(FormatBytes(stat.size, DATA_UNITS_KIBIBYTE, false)),
-      WideToUTF16Hack(FormatBytes(stat.liveSize, DATA_UNITS_KIBIBYTE, false)));
+      FormatBytes(stat.size, DATA_UNITS_KIBIBYTE, false),
+      FormatBytes(stat.liveSize, DATA_UNITS_KIBIBYTE, false));
 }
 
 }  // namespace
@@ -126,8 +126,8 @@ string16 TaskManagerModel::GetResourceNetworkUsage(int index) const {
     return l10n_util::GetStringUTF16(IDS_TASK_MANAGER_NA_CELL_TEXT);
   if (net_usage == 0)
     return ASCIIToUTF16("0");
-  string16 net_byte = WideToUTF16(
-      FormatSpeed(net_usage, GetByteDisplayUnits(net_usage), true));
+  string16 net_byte = FormatSpeed(net_usage, GetByteDisplayUnits(net_usage),
+                                  true);
   // Force number string to have LTR directionality.
   return base::i18n::GetDisplayStringInLTRDirectionality(net_byte);
 }
@@ -217,12 +217,12 @@ string16 TaskManagerModel::GetResourceV8MemoryAllocatedSize(
   if (!resources_[index]->ReportsV8MemoryStats())
     return l10n_util::GetStringUTF16(IDS_TASK_MANAGER_NA_CELL_TEXT);
   return l10n_util::GetStringFUTF16(IDS_TASK_MANAGER_CACHE_SIZE_CELL_TEXT,
-      WideToUTF16Hack(FormatBytes(resources_[index]->GetV8MemoryAllocated(),
-                                  DATA_UNITS_KIBIBYTE,
-                                  false)),
-      WideToUTF16Hack(FormatBytes(resources_[index]->GetV8MemoryUsed(),
-                                  DATA_UNITS_KIBIBYTE,
-                                  false)));
+      FormatBytes(resources_[index]->GetV8MemoryAllocated(),
+                  DATA_UNITS_KIBIBYTE,
+                  false),
+      FormatBytes(resources_[index]->GetV8MemoryUsed(),
+                  DATA_UNITS_KIBIBYTE,
+                  false));
 }
 
 bool TaskManagerModel::IsResourceFirstInGroup(int index) const {
diff --git a/net/base/net_util.cc b/net/base/net_util.cc
index a125664..d0b034b 100644
--- a/net/base/net_util.cc
+++ b/net/base/net_util.cc
@@ -1055,7 +1055,8 @@ std::string GetDirectoryListingEntry(const string16& name,
   }
 
   base::JsonDoubleQuote(
-      WideToUTF16Hack(FormatBytes(size, GetByteDisplayUnits(size), true)), true,
+      FormatBytes(size, GetByteDisplayUnits(size), true),
+      true,
       &result);
 
   result.append(",");
diff --git a/webkit/appcache/view_appcache_internals_job.cc b/webkit/appcache/view_appcache_internals_job.cc
index f96fe37..93390cc 100644
--- a/webkit/appcache/view_appcache_internals_job.cc
+++ b/webkit/appcache/view_appcache_internals_job.cc
@@ -109,7 +109,7 @@ void AddHTMLFromAppCacheToOutput(
     out->append("<ul>");
 
     AddLiTag(kSize,
-             WideToUTF8(FormatBytes(
+             UTF16ToUTF8(FormatBytes(
                  info->size, GetByteDisplayUnits(info->size), true)),
              out);
     AddLiTag(kCreationTime,