Reland: Move the user agent styles sheets to blink_resources.grd (Part 3)

Source/core/rendering/RenderThemeChromiumMac.mm

Index: Source/core/rendering/RenderThemeChromiumMac.mm
diff --git a/Source/core/rendering/RenderThemeChromiumMac.mm b/Source/core/rendering/RenderThemeChromiumMac.mm
index 3eaa0b614ec53b33645b270abc0cd2e093079e9c..ba033327134463519eaa487772f7fbc91b3e8084 100644
--- a/Source/core/rendering/RenderThemeChromiumMac.mm
+++ b/Source/core/rendering/RenderThemeChromiumMac.mm
@@ -23,7 +23,6 @@
 
 #import "core/CSSValueKeywords.h"
 #import "core/HTMLNames.h"
-#import "core/UserAgentStyleSheets.h"
 #import "core/css/CSSValueList.h"
 #import "core/dom/Document.h"
 #import "core/dom/Element.h"
@@ -44,6 +43,7 @@
 #import "core/rendering/RenderView.h"
 #import "core/rendering/style/ShadowList.h"
 #import "platform/LayoutTestSupport.h"
+#import "platform/PlatformResourceLoader.h"
 #import "platform/SharedBuffer.h"
 #import "platform/geometry/FloatRoundedRect.h"
 #import "platform/graphics/BitmapImage.h"
@@ -1797,9 +1797,9 @@ String RenderThemeChromiumMac::extraFullScreenStyleSheet()
 String RenderThemeChromiumMac::extraDefaultStyleSheet()
 {
     return RenderTheme::extraDefaultStyleSheet() +
-        String(themeChromiumCss, sizeof(themeChromiumCss)) +
-        String(themeInputMultipleFieldsCss, sizeof(themeInputMultipleFieldsCss)) +
-        String(themeMacCss, sizeof(themeMacCss));
+        loadResourceAsASCIIString("themeChromium.css") +
+        loadResourceAsASCIIString("themeInputMultipleFields.css") +
+        loadResourceAsASCIIString("themeMac.css");
 }
 
 bool RenderThemeChromiumMac::paintMediaVolumeSliderContainer(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)