Align base::hash_map with C++11.

content/common/gpu/gpu_memory_manager_unittest.cc

Index: content/common/gpu/gpu_memory_manager_unittest.cc
diff --git a/content/common/gpu/gpu_memory_manager_unittest.cc b/content/common/gpu/gpu_memory_manager_unittest.cc
index cf9e7cfffe98a92f3e1bb0e7b0a25d318fc92db5..72017bab294e6cb7ff356f64d4399a9970485927 100644
--- a/content/common/gpu/gpu_memory_manager_unittest.cc
+++ b/content/common/gpu/gpu_memory_manager_unittest.cc
@@ -12,17 +12,6 @@
 
 using gpu::MemoryAllocation;
 
-#if defined(COMPILER_GCC)
-namespace BASE_HASH_NAMESPACE {
-template<>
-struct hash<content::GpuMemoryManagerClient*> {
-  uint64 operator()(content::GpuMemoryManagerClient* ptr) const {
-    return hash<uint64>()(reinterpret_cast<uint64>(ptr));
-  }
-};
-}  // namespace BASE_HASH_NAMESPACE
-#endif  // COMPILER
-
 class FakeMemoryTracker : public gpu::gles2::MemoryTracker {
  public:
   virtual void TrackMemoryAllocatedChange(