Improve GPU process URL crash reporting

content/common/gpu/gpu_command_buffer_stub.h

Index: content/common/gpu/gpu_command_buffer_stub.h
diff --git a/content/common/gpu/gpu_command_buffer_stub.h b/content/common/gpu/gpu_command_buffer_stub.h
index a6a90d6def77d3e2d93bcf4256f9badd20c79f54..354152cc5fd00c1064dc678549c76b359363c1c9 100644
--- a/content/common/gpu/gpu_command_buffer_stub.h
+++ b/content/common/gpu/gpu_command_buffer_stub.h
@@ -16,6 +16,7 @@
 #include "content/common/content_export.h"
 #include "content/common/gpu/gpu_memory_allocation.h"
 #include "content/common/gpu/gpu_memory_allocation.h"
+#include "googleurl/src/gurl.h"
 #include "gpu/command_buffer/common/constants.h"
 #include "gpu/command_buffer/service/command_buffer_service.h"
 #include "gpu/command_buffer/service/context_group.h"
@@ -104,7 +105,8 @@ class GpuCommandBufferStub
       int32 route_id,
       int32 surface_id,
       GpuWatchdog* watchdog,
-      bool software);
+      bool software,
+      const GURL& active_url);
 
   virtual ~GpuCommandBufferStub();
 
@@ -229,6 +231,9 @@ class GpuCommandBufferStub
 
   void ReportState();
 
+  // Wrapper for GpuScheduler::PutChanged that sets the crash report URL.
+  void PutChanged();
+
   // The lifetime of objects of this class is managed by a GpuChannel. The
   // GpuChannels destroy all the GpuCommandBufferStubs that they own when they
   // are destroyed. So a raw pointer is safe.
@@ -276,6 +281,9 @@ class GpuCommandBufferStub
 
   scoped_refptr<gpu::RefCountedCounter> preempt_by_counter_;
 
+  GURL active_url_;
+  size_t active_url_hash_;
+
   DISALLOW_COPY_AND_ASSIGN(GpuCommandBufferStub);
 };