cc: Set ui/gpu/cc/ipc/upload/raster thread priorities.

content/renderer/gpu/compositor_thread.cc

Index: content/renderer/gpu/compositor_thread.cc
diff --git a/content/renderer/gpu/compositor_thread.cc b/content/renderer/gpu/compositor_thread.cc
index 815d1c221b155cab71ddea083fc165e5350bb124..cde2e933d8ac22a16ab1c6cfd57d1dec98168c2d 100644
--- a/content/renderer/gpu/compositor_thread.cc
+++ b/content/renderer/gpu/compositor_thread.cc
@@ -12,6 +12,11 @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebCompositorInputHandler.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
 
+#if defined(OS_ANDROID)
+// TODO(epenner): Move thread priorities to base. (crbug.com/170549)
+#include <sys/resource.h>
+#endif
+
 using WebKit::WebCompositorInputHandler;
 using WebKit::WebInputEvent;
 
@@ -83,6 +88,16 @@ class CompositorThread::InputHandlerWrapper
 
 //------------------------------------------------------------------------------
 
+#if defined(OS_ANDROID)
+// TODO(epenner): Move thread priorities to base. (crbug.com/170549)
+namespace {
+void SetHighThreadPriority() {
+  int nice_value = -6; // High priority.
+  setpriority(PRIO_PROCESS, base::PlatformThread::CurrentId(), nice_value);
+}
+}
+#endif
+
 CompositorThread::CompositorThread(IPC::Listener* main_listener)
     : thread_("Compositor") {
   filter_ =
@@ -90,6 +105,11 @@ CompositorThread::CompositorThread(IPC::Listener* main_listener)
                            thread_.message_loop()->message_loop_proxy(),
                            base::Bind(&CompositorThread::HandleInputEvent,
                                       base::Unretained(this)));
+#if defined(OS_ANDROID)
+// TODO(epenner): Move thread priorities to base. (crbug.com/170549)
+  thread_.message_loop()->PostTask(FROM_HERE,
+                                   base::Bind(&SetHighThreadPriority));
+#endif
 }
 
 CompositorThread::~CompositorThread() {