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 5fe39acf8ad709f25340e6a776be2ccbb941dd70..14ec0fb688e45da3fecf1b4406c2fe71b5e994fd 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"
@@ -55,6 +54,8 @@
 #import "platform/mac/WebCoreNSCellExtras.h"
 #import "platform/text/PlatformLocale.h"
 #import "platform/text/StringTruncator.h"
+#import "public/platform/Platform.h"
+#import "public/platform/WebData.h"
 
 #import <AvailabilityMacros.h>
 #import <Carbon/Carbon.h>
@@ -1860,10 +1861,19 @@ String RenderThemeChromiumMac::extraFullScreenStyleSheet()
 
 String RenderThemeChromiumMac::extraDefaultStyleSheet()
 {
-    return RenderTheme::extraDefaultStyleSheet() +
-        String(themeChromiumCss, sizeof(themeChromiumCss)) +
-        String(themeInputMultipleFieldsCss, sizeof(themeInputMultipleFieldsCss)) +
-        String(themeMacCss, sizeof(themeMacCss));
+    const WebData& themeChromiumCssResource = Platform::current()->loadResource("themeChromium.css");
+    String themeChromiumRules = themeChromiumCssResource.toASCIIString();
+    ASSERT(!themeChromiumRules.isEmpty());
+
+    const WebData& themeInputMultipleFieldsCssResource = Platform::current()->loadResource("themeInputMultipleFields.css");
+    String themeInputMultipleFieldsRules = themeInputMultipleFieldsCssResource.toASCIIString();
+    ASSERT(!themeInputMultipleFieldsRules.isEmpty());
+
+    const WebData& themeMacCssResource = Platform::current()->loadResource("themeMac.css");
+    String themeMacRules = themeMacCssResource.toASCIIString();
+    ASSERT(!themeMacRules.isEmpty());
+
+    return RenderTheme::extraDefaultStyleSheet() + themeChromiumRules + themeInputMultipleFieldsRules + themeMacRules;
 }
 
 bool RenderThemeChromiumMac::paintMediaVolumeSliderContainer(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)