Add IPCs to check web copy/cut/paste for extensions with the appropriate permission bit.

content/browser/renderer_host/render_message_filter.cc

Index: content/browser/renderer_host/render_message_filter.cc
diff --git a/content/browser/renderer_host/render_message_filter.cc b/content/browser/renderer_host/render_message_filter.cc
index ad28245826425187e7fbafddee97eba0d8233dee..34ece39210d75372bda50594ae411d9586d528d2 100644
--- a/content/browser/renderer_host/render_message_filter.cc
+++ b/content/browser/renderer_host/render_message_filter.cc
@@ -40,6 +40,7 @@
 #include "content/browser/renderer_host/render_widget_helper.h"
 #include "content/common/desktop_notification_messages.h"
 #include "content/common/notification_service.h"
+#include "content/common/url_constants.h"
 #include "content/common/view_messages.h"
 #include "ipc/ipc_channel_handle.h"
 #include "net/base/cookie_monster.h"
@@ -365,6 +366,10 @@ bool RenderMessageFilter::OnMessageReceived(const IPC::Message& message,
     IPC_MESSAGE_HANDLER(ViewHostMsg_AllocateSharedMemoryBuffer,
                         OnAllocateSharedMemoryBuffer)
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidZoomURL, OnDidZoomURL)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_CanTriggerClipboardRead,
+                        OnCanTriggerClipboardRead)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_CanTriggerClipboardWrite,
+                        OnCanTriggerClipboardWrite)
 #if defined(OS_MACOSX)
     IPC_MESSAGE_HANDLER(ViewHostMsg_AllocTransportDIB, OnAllocTransportDIB)
     IPC_MESSAGE_HANDLER(ViewHostMsg_FreeTransportDIB, OnFreeTransportDIB)
@@ -706,6 +711,23 @@ void RenderMessageFilter::OnDidZoomURL(const IPC::Message& message,
           zoom_level, remember, url, render_process_id_, message.routing_id()));
 }
 
+void RenderMessageFilter::OnCanTriggerClipboardRead(const GURL& url,
+                                                    bool* allowed) {
+  ChromeURLRequestContext* context = GetRequestContextForURL(url);
+  *allowed = context->extension_info_map()->CheckURLAccessToExtensionPermission(
+      url, Extension::kClipboardReadPermission);
+}
+
+void RenderMessageFilter::OnCanTriggerClipboardWrite(const GURL& url,
+                                                     bool* allowed) {
+  ChromeURLRequestContext* context = GetRequestContextForURL(url);
+  // Since all extensions could historically write to the clipboard, preserve it
+  // for compatibility.
+  *allowed = url.SchemeIs(chrome::kExtensionScheme) ||
+      context->extension_info_map()->CheckURLAccessToExtensionPermission(
+          url, Extension::kClipboardWritePermission);
+}
+
 void RenderMessageFilter::UpdateHostZoomLevelsOnUIThread(
     double zoom_level,
     bool remember,