Added RenderView.DocumentHasImages query method

content/common/view_messages.h

Index: content/common/view_messages.h
diff --git a/content/common/view_messages.h b/content/common/view_messages.h
index f160752326f60f92e4d2b493c229d43c0655c40a..2721160514d04cc1b1f1b17b70d9720799e0f4e3 100644
--- a/content/common/view_messages.h
+++ b/content/common/view_messages.h
@@ -1261,6 +1261,12 @@ IPC_MESSAGE_CONTROL1(ViewMsg_TempCrashWithData,
 IPC_MESSAGE_ROUTED1(ViewMsg_SetAccessibilityMode,
                     AccessibilityMode)
 
+// Request for the renderer to determine if the document contains any image
+// elements.  The id should be passed in the response message so the response
+// can be associated with the request.
+IPC_MESSAGE_ROUTED1(ViewMsg_DocumentHasImages,
+                    int /* id */)
+
 // -----------------------------------------------------------------------------
 // Messages sent from the renderer to the browser.
 
@@ -1914,6 +1920,11 @@ IPC_MESSAGE_ROUTED3(ViewHostMsg_UpdateZoomLimits,
 IPC_MESSAGE_CONTROL1(ViewHostMsg_SuddenTerminationChanged,
                      bool /* enabled */)
 
+// Response to ViewMSg_DocumentHasImages request.
+IPC_MESSAGE_ROUTED2(ViewHostMsg_DocumentHasImagesResponse,
+                    int, /* id */
+                    bool /* has_images */)
+
 #if defined(OS_MACOSX)
 // On OSX, we cannot allocated shared memory from within the sandbox, so
 // this call exists for the renderer to ask the browser to allocate memory