Move code from StyleResolver to ViewportStyleResolver.

Source/core/css/resolver/ViewportStyleResolver.cpp

Index: Source/core/css/resolver/ViewportStyleResolver.cpp
diff --git a/Source/core/css/resolver/ViewportStyleResolver.cpp b/Source/core/css/resolver/ViewportStyleResolver.cpp
index 7c957ea3d5f14e16d2fca85959c84dabd21a35e4..5111f8cf58160e542c38719b92bce7579c2ffbec 100644
--- a/Source/core/css/resolver/ViewportStyleResolver.cpp
+++ b/Source/core/css/resolver/ViewportStyleResolver.cpp
@@ -31,14 +31,17 @@
 #include "core/css/resolver/ViewportStyleResolver.h"
 
 #include "core/CSSValueKeywords.h"
+#include "core/css/CSSDefaultStyleSheets.h"
 #include "core/css/CSSPrimitiveValueMappings.h"
 #include "core/css/CSSToLengthConversionData.h"
 #include "core/css/StylePropertySet.h"
 #include "core/css/StyleRule.h"
+#include "core/css/resolver/ScopedStyleResolver.h"
 #include "core/dom/Document.h"
 #include "core/dom/NodeLayoutStyle.h"
 #include "core/dom/ViewportDescription.h"
 #include "core/frame/FrameView.h"
+#include "core/inspector/InspectorInstrumentation.h"
 
 namespace blink {
 
@@ -51,11 +54,31 @@ ViewportStyleResolver::ViewportStyleResolver(Document* document)
     ASSERT(m_document);
 }
 
+void ViewportStyleResolver::collectViewportRules()
+{
+    CSSDefaultStyleSheets& defaultStyleSheets = CSSDefaultStyleSheets::instance();
+    collectViewportRules(defaultStyleSheets.defaultStyle(), UserAgentOrigin);
+
+    RuleSet* rules = defaultStyleSheets.defaultViewportStyle();
+    if (InspectorInstrumentation::shouldApplyViewportStyleOverride(m_document))
+        rules = defaultStyleSheets.defaultViewportOverrideStyle();
+
+    collectViewportRules(rules, UserAgentOrigin);
+
+    if (m_document->isMobileDocument())
+        collectViewportRules(defaultStyleSheets.defaultXHTMLMobileProfileStyle(), UserAgentOrigin);
+
+    if (ScopedStyleResolver* scopedResolver = m_document->scopedStyleResolver())
+        scopedResolver->collectViewportRulesTo(this);
+
+    resolve();
+}
+
 void ViewportStyleResolver::collectViewportRules(RuleSet* rules, Origin origin)
 {
     rules->compactRulesIfNeeded();
 
-    const WillBeHeapVector<RawPtrWillBeMember<StyleRuleViewport> >& viewportRules = rules->viewportRules();
+    const WillBeHeapVector<RawPtrWillBeMember<StyleRuleViewport>>& viewportRules = rules->viewportRules();
     for (size_t i = 0; i < viewportRules.size(); ++i)
         addViewportRule(viewportRules[i], origin);
 }
@@ -84,9 +107,6 @@ void ViewportStyleResolver::addViewportRule(StyleRuleViewport* viewportRule, Ori
 
 void ViewportStyleResolver::resolve()
 {
-    if (!m_document)
-        return;
-
     if (!m_propertySet) {
         m_document->setViewportDescription(ViewportDescription(ViewportDescription::UserAgentStyleSheet));
         return;