Moving extension code out of "components/" to avoid layering violations.

chrome/browser/renderer_context_menu/context_menu_content_type_platform_app.cc

Index: chrome/browser/renderer_context_menu/context_menu_content_type_platform_app.cc
diff --git a/chrome/browser/renderer_context_menu/context_menu_content_type_platform_app.cc b/chrome/browser/renderer_context_menu/context_menu_content_type_platform_app.cc
index 9fdf92d07248cc02968b34b2aa3bf344490c3ccc..3df598de7e9f4c9f6b843cfd8c69f14e1746716d 100644
--- a/chrome/browser/renderer_context_menu/context_menu_content_type_platform_app.cc
+++ b/chrome/browser/renderer_context_menu/context_menu_content_type_platform_app.cc
@@ -6,9 +6,14 @@
 
 #include "base/command_line.h"
 #include "chrome/common/chrome_switches.h"
+#include "content/public/browser/web_contents.h"
+#include "extensions/browser/process_manager.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/manifest.h"
 
+using extensions::Extension;
+using extensions::ProcessManager;
+
 ContextMenuContentTypePlatformApp::ContextMenuContentTypePlatformApp(
     content::WebContents* web_contents,
     const content::ContextMenuParams& params)
@@ -18,6 +23,13 @@ ContextMenuContentTypePlatformApp::ContextMenuContentTypePlatformApp(
 ContextMenuContentTypePlatformApp::~ContextMenuContentTypePlatformApp() {
 }
 
+const Extension* ContextMenuContentTypePlatformApp::GetExtension() const {
+  ProcessManager* process_manager =
+      ProcessManager::Get(source_web_contents()->GetBrowserContext());
+  return process_manager->GetExtensionForWebContents(
+      source_web_contents());
+}
+
 bool ContextMenuContentTypePlatformApp::SupportsGroup(int group) {
   const extensions::Extension* platform_app = GetExtension();