DevTools: remove dependency of most agents on InspectorPageAgent

Source/core/inspector/InspectorCSSAgent.cpp

Index: Source/core/inspector/InspectorCSSAgent.cpp
diff --git a/Source/core/inspector/InspectorCSSAgent.cpp b/Source/core/inspector/InspectorCSSAgent.cpp
index c3b82416d50ef14f5dbbfa91ff06e83431d6c84a..81b647748bf4eb718acd2a648a4d1a667225c77d 100644
--- a/Source/core/inspector/InspectorCSSAgent.cpp
+++ b/Source/core/inspector/InspectorCSSAgent.cpp
@@ -54,6 +54,7 @@
 #include "core/html/HTMLHeadElement.h"
 #include "core/html/VoidCallback.h"
 #include "core/inspector/InspectorHistory.h"
+#include "core/inspector/InspectorIdentifiers.h"
 #include "core/inspector/InspectorPageAgent.h"
 #include "core/inspector/InspectorResourceAgent.h"
 #include "core/inspector/InspectorResourceContentLoader.h"
@@ -427,8 +428,9 @@ CSSMediaRule* InspectorCSSAgent::asCSSMediaRule(CSSRule* rule)
     return toCSSMediaRule(rule);
 }
 
-InspectorCSSAgent::InspectorCSSAgent(InspectorDOMAgent* domAgent, InspectorPageAgent* pageAgent, InspectorResourceAgent* resourceAgent)
+InspectorCSSAgent::InspectorCSSAgent(LocalFrame* inspectedFrame, InspectorDOMAgent* domAgent, InspectorPageAgent* pageAgent, InspectorResourceAgent* resourceAgent)
     : InspectorBaseAgent<InspectorCSSAgent, InspectorFrontend::CSS>("CSS")
+    , m_inspectedFrame(inspectedFrame)
     , m_domAgent(domAgent)
     , m_pageAgent(pageAgent)
     , m_resourceAgent(resourceAgent)
@@ -525,7 +527,7 @@ void InspectorCSSAgent::disable(ErrorString*)
 
 void InspectorCSSAgent::didCommitLoadForLocalFrame(LocalFrame* frame)
 {
-    if (frame == m_pageAgent->inspectedFrame()) {
+    if (frame == m_inspectedFrame) {
         reset();
         m_editedStyleSheets.clear();
     }
@@ -1009,8 +1011,8 @@ void InspectorCSSAgent::setMediaText(ErrorString* errorString, const String& sty
 
 void InspectorCSSAgent::createStyleSheet(ErrorString* errorString, const String& frameId, TypeBuilder::CSS::StyleSheetId* outStyleSheetId)
 {
-    LocalFrame* frame = m_pageAgent->frameForId(frameId);
-    if (!frame) {
+    LocalFrame* frame = InspectorIdentifiers<LocalFrame>::lookup(frameId);
+    if (!frame || frame->instrumentingAgents() != m_inspectedFrame->instrumentingAgents()) {
         *errorString = "Frame not found";
         return;
     }
@@ -1551,6 +1553,7 @@ void InspectorCSSAgent::resetPseudoStates()
 
 DEFINE_TRACE(InspectorCSSAgent)
 {
+    visitor->trace(m_inspectedFrame);
     visitor->trace(m_domAgent);
     visitor->trace(m_pageAgent);
     visitor->trace(m_resourceAgent);