Use CheckedNumerics in AsyncPixelTransfersCompletedQuery, add tests

gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.h

Index: gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.h
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.h b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.h
index f8aea41d0887491fbf1cce22fe4b5ec01007578d..16abb411960c95889c741f62bc95337d7ef88059 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.h
@@ -171,6 +171,8 @@ class GLES2DecoderTestBase : public testing::Test {
       bool bind_generates_resource,
       const CommandLine* command_line);
 
+  void ResetDecoder();
+
   const ContextGroup& group() const {
     return *group_.get();
   }
@@ -518,7 +520,7 @@ class GLES2DecoderTestBase : public testing::Test {
     virtual gpu::Buffer GetSharedMemoryBuffer(int32 shm_id) OVERRIDE;
 
     void ClearSharedMemory() {
-      memset(data_.get(), kInitialMemoryValue, kSharedBufferSize);
+      memset(shm_->memory(), kInitialMemoryValue, kSharedBufferSize);
     }
 
     virtual void set_token(int32 token) OVERRIDE;
@@ -532,7 +534,7 @@ class GLES2DecoderTestBase : public testing::Test {
     virtual int32 GetGetOffset() OVERRIDE;
 
    private:
-    scoped_ptr<int8[]> data_;
+    scoped_ptr<base::SharedMemory> shm_;
     gpu::Buffer valid_buffer_;
     gpu::Buffer invalid_buffer_;
   };