Move download messages from Renderer to Frame filter.

content/browser/frame_host/render_frame_message_filter.cc

Index: content/browser/frame_host/render_frame_message_filter.cc
diff --git a/content/browser/frame_host/render_frame_message_filter.cc b/content/browser/frame_host/render_frame_message_filter.cc
index 98bd0fd5e3783c7150b678adff464706a4864953..cf639787a8538cad72048dd196c77eedb4b4f5df 100644
--- a/content/browser/frame_host/render_frame_message_filter.cc
+++ b/content/browser/frame_host/render_frame_message_filter.cc
@@ -10,14 +10,20 @@
 #include "base/strings/string_util.h"
 #include "build/build_config.h"
 #include "content/browser/bad_message.h"
+#include "content/browser/blob_storage/chrome_blob_storage_context.h"
 #include "content/browser/child_process_security_policy_impl.h"
+#include "content/browser/download/download_stats.h"
 #include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/renderer_host/render_widget_helper.h"
+#include "content/browser/resource_context_impl.h"
+#include "content/common/content_constants_internal.h"
 #include "content/common/frame_messages.h"
 #include "content/common/view_messages.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/download_manager.h"
+#include "content/public/browser/download_url_parameters.h"
 #include "content/public/common/content_constants.h"
 #include "content/public/common/content_switches.h"
 #include "gpu/GLES2/gl2extchromium.h"
@@ -26,6 +32,7 @@
 #include "net/cookies/cookie_store.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_getter.h"
+#include "storage/browser/blob/blob_storage_context.h"
 #include "url/gurl.h"
 
 #if !defined(OS_MACOSX)
@@ -70,6 +77,21 @@ void CreateChildFrameOnUI(
   }
 }
 
+void DownloadUrlOnUIThread(std::unique_ptr<DownloadUrlParameters> parameters) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+
+  RenderProcessHost* render_process_host =
+      RenderProcessHost::FromID(parameters->render_process_host_id());
+  if (!render_process_host)
+    return;
+
+  BrowserContext* browser_context = render_process_host->GetBrowserContext();
+  DownloadManager* download_manager =
+      BrowserContext::GetDownloadManager(browser_context);
+  RecordDownloadSource(INITIATED_BY_RENDERER);
+  download_manager->DownloadUrl(std::move(parameters));
+}
+
 // Common functionality for converting a sync renderer message to a callback
 // function in the browser. Derive from this, create it on the heap when
 // issuing your callback. When done, write your reply parameters into
@@ -207,6 +229,9 @@ bool RenderFrameMessageFilter::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(FrameHostMsg_SetCookie, OnSetCookie)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(FrameHostMsg_GetCookies, OnGetCookies)
     IPC_MESSAGE_HANDLER(FrameHostMsg_CookiesEnabled, OnCookiesEnabled)
+    IPC_MESSAGE_HANDLER(FrameHostMsg_DownloadUrl, OnDownloadUrl)
+    IPC_MESSAGE_HANDLER(FrameHostMsg_SaveImageFromDataURL,
+                        OnSaveImageFromDataURL)
     IPC_MESSAGE_HANDLER(FrameHostMsg_Are3DAPIsBlocked, OnAre3DAPIsBlocked)
     IPC_MESSAGE_HANDLER_GENERIC(FrameHostMsg_RenderProcessGone,
                                 OnRenderProcessGone())
@@ -230,6 +255,37 @@ bool RenderFrameMessageFilter::OnMessageReceived(const IPC::Message& message) {
   return handled;
 }
 
+void RenderFrameMessageFilter::DownloadUrl(int render_view_id,
+                                           int render_frame_id,
+                                           const GURL& url,
+                                           const Referrer& referrer,
+                                           const base::string16& suggested_name,
+                                           const bool use_prompt) const {
+  if (!resource_context_)
+    return;
+
+  std::unique_ptr<DownloadUrlParameters> parameters(
+      new DownloadUrlParameters(url, render_process_id_, render_view_id,
+                                render_frame_id, request_context_.get()));
+  parameters->set_content_initiated(true);
+  parameters->set_suggested_name(suggested_name);
+  parameters->set_prompt(use_prompt);
+  parameters->set_referrer(referrer);
+
+  if (url.SchemeIsBlob()) {
+    ChromeBlobStorageContext* blob_context =
+        GetChromeBlobStorageContextForResourceContext(resource_context_);
+    parameters->set_blob_data_handle(
+        blob_context->context()->GetBlobDataFromPublicURL(url));
+    // Don't care if the above fails. We are going to let the download go
+    // through and allow it to be interrupted so that the embedder can deal.
+  }
+
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      base::Bind(&DownloadUrlOnUIThread, base::Passed(&parameters)));
+}
+
 void RenderFrameMessageFilter::OnCreateChildFrame(
     const FrameHostMsg_CreateChildFrame_Params& params,
     int* new_routing_id) {
@@ -355,6 +411,32 @@ void RenderFrameMessageFilter::SendGetCookiesResponse(
   Send(reply_msg);
 }
 
+void RenderFrameMessageFilter::OnDownloadUrl(
+    int render_view_id,
+    int render_frame_id,
+    const GURL& url,
+    const Referrer& referrer,
+    const base::string16& suggested_name) {
+  DownloadUrl(render_view_id, render_frame_id, url, referrer, suggested_name,
+              false);
+}
+
+void RenderFrameMessageFilter::OnSaveImageFromDataURL(
+    int render_view_id,
+    int render_frame_id,
+    const std::string& url_str) {
+  // Please refer to RenderFrameImpl::saveImageFromDataURL().
+  if (url_str.length() >= kMaxLengthOfDataURLString)
+    return;
+
+  GURL data_url(url_str);
+  if (!data_url.is_valid() || !data_url.SchemeIs(url::kDataScheme))
+    return;
+
+  DownloadUrl(render_view_id, render_frame_id, data_url, Referrer(),
+              base::string16(), true);
+}
+
 void RenderFrameMessageFilter::OnAre3DAPIsBlocked(int render_frame_id,
                                                   const GURL& top_origin_url,
                                                   ThreeDAPIType requester,