Consistently use LoFi for an entire page

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index b42860a347326f73bf1a8c8600251accf5273585..028ca203c9273edd11ad813eb9541dcdbeaf7a68 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -40,7 +40,6 @@
 #include "content/common/frame_messages.h"
 #include "content/common/frame_replication_state.h"
 #include "content/common/input_messages.h"
-#include "content/common/navigation_params.h"
 #include "content/common/service_worker/service_worker_types.h"
 #include "content/common/site_isolation_policy.h"
 #include "content/common/swapped_out_messages.h"
@@ -642,7 +641,7 @@ void RenderFrameImpl::CreateFrame(
     render_frame->render_widget_->RegisterRenderFrame(render_frame);
   }
 
-  render_frame->Initialize();
+  render_frame->Initialize(LOFI_DEFAULT);
 }
 
 // static
@@ -743,6 +742,7 @@ RenderFrameImpl::RenderFrameImpl(const CreateParams& params)
       manifest_manager_(NULL),
       accessibility_mode_(AccessibilityModeOff),
       renderer_accessibility_(NULL),
+      lofi_state_(LOFI_DEFAULT),
       weak_factory_(this) {
   std::pair<RoutingIDFrameMap::iterator, bool> result =
       g_routing_id_frame_map.Get().insert(std::make_pair(routing_id_, this));
@@ -812,9 +812,10 @@ void RenderFrameImpl::SetWebFrame(blink::WebLocalFrame* web_frame) {
   frame_ = web_frame;
 }
 
-void RenderFrameImpl::Initialize() {
+void RenderFrameImpl::Initialize(LoFiState lofi_state) {
   is_subframe_ = !!frame_->parent();
   is_local_root_ = !frame_->parent() || frame_->parent()->isWebRemoteFrame();
+  lofi_state_ = lofi_state;
 
 #if defined(ENABLE_PLUGINS)
   new PepperBrowserConnection(this);
@@ -2012,6 +2013,10 @@ void RenderFrameImpl::AddMessageToConsole(ConsoleMessageLevel level,
     devtools_agent_->AddMessageToConsole(level, message);
 }
 
+bool RenderFrameImpl::LoFiOn() {
+  return lofi_state_ == LOFI_ON;
+}
+
 // blink::WebFrameClient implementation ----------------------------------------
 
 blink::WebPlugin* RenderFrameImpl::createPlugin(
@@ -2231,7 +2236,7 @@ blink::WebFrame* RenderFrameImpl::createChildFrame(
 
   // Add the frame to the frame tree and initialize it.
   parent->appendChild(web_frame);
-  child_render_frame->Initialize();
+  child_render_frame->Initialize(lofi_state_);
 
   return web_frame;
 }
@@ -2703,6 +2708,9 @@ void RenderFrameImpl::didCommitProvisionalLoad(
       DocumentState::FromDataSource(frame->dataSource());
   NavigationStateImpl* navigation_state =
       static_cast<NavigationStateImpl*>(document_state->navigation_state());
+  WebURLResponseExtraDataImpl* extra_data = GetExtraDataFromResponse(
+      frame->dataSource()->response());
+  lofi_state_ = extra_data && extra_data->is_lofi() ? LOFI_ON : LOFI_OFF;
 
   if (proxy_routing_id_ != MSG_ROUTING_NONE) {
     RenderFrameProxy* proxy =
@@ -3357,6 +3365,12 @@ void RenderFrameImpl::willSendRequest(
       navigation_state->start_params().transferred_request_request_id);
   extra_data->set_service_worker_provider_id(provider_id);
   extra_data->set_stream_override(stream_override.Pass());
+  // TODO(megjablon): Set the navigation params for single image loads to
+  // LOFI_OFF and remove the dependency on ReloadBypassingCache.
+  if (request.cachePolicy() == WebURLRequest::ReloadBypassingCache)
+    extra_data->set_lofi_state(LOFI_OFF);
+  else
+    extra_data->set_lofi_state(lofi_state_);
   request.setExtraData(extra_data);
 
   // TODO(creis): Update prefetching to work with out-of-process iframes.
@@ -4483,6 +4497,8 @@ void RenderFrameImpl::NavigateInternal(
 
   GetContentClient()->SetActiveURL(common_params.url);
 
+  lofi_state_ = (LoFiState) request_params.lofi_state;

[nasko, 2015/09/17 23:09:00]

Why do we need a cast here?

[megjablon, 2015/09/18 23:22:11]

Done.

+
   // If this frame isn't in the same process as the main frame, it may naively
   // assume that this is the first navigation in the iframe, but this may not
   // actually be the case. Inform the frame's state machine if this frame has