Revert of Use the updated AMD switchable info collection code....

Revert of Use the updated AMD switchable info collection code. (https://codereview.chromium.org/332843003/)

Reason for revert:
The patch appears to have broken windows perf bot:

http://build.chromium.org/p/chromium.perf/builders/Win%20Builder/builds/69732

Original issue's description:
> Use the updated AMD switchable info collection code.
> 
> BUG=376562
> TEST=
> R=kbr@chromium.org
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=276865

TBR=kbr@chromium.org,zmo@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=376562

Review URL: https://codereview.chromium.org/333683004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@276879 0039d316-1c4b-4281-b951-d872f2087c98

gpu/config/gpu_info_collector.h

@@ -66,8 +66,6 @@ GPU_EXPORT void MergeGPUInfoGL(GPUInfo* basic_gpu_info,
 
 // Advanced Micro Devices has interesting configurations on laptops were
 // there are two videocards that can alternatively a given process output.
-// TODO(zmo): remove them when we remove the GetAMDVideocardType() in the
-//            internal src/third_party/amd.
 enum AMDVideoCardType {
   UNKNOWN,
   STANDALONE,

gpu/config/gpu_info_collector_win.cc

@@ -363,14 +363,13 @@ void CollectD3D11Support() {
 }  // namespace anonymous
 
 #if !defined(GOOGLE_CHROME_BUILD)
-void GetAMDVideocardInfo(GPUInfo* gpu_info) {
-  DCHECK(gpu_info);
-  return;
+AMDVideoCardType GetAMDVideocardType() {
+  return STANDALONE;
 }
 #else
 // This function has a real implementation for official builds that can
 // be found in src/third_party/amd.
-void GetAMDVideocardInfo(GPUInfo* gpu_info);
+AMDVideoCardType GetAMDVideocardType();
 #endif
 
 bool CollectDriverInfoD3D(const std::wstring& device_id,
@@ -434,14 +433,9 @@ bool CollectDriverInfoD3D(const std::wstring& device_id,
             // signal the videocard is assumed to be switchable. Additionally,
             // some switchable systems with Intel GPUs aren't correctly
             // detected, so always count them.
-            GetAMDVideocardInfo(gpu_info);
-            if (!gpu_info->amd_switchable &&
-                gpu_info->gpu.vendor_id == 0x8086) {
-              gpu_info->amd_switchable = true;
-              gpu_info->secondary_gpus.push_back(gpu_info->gpu);
-              gpu_info->gpu.vendor_id = 0x1002;
-              gpu_info->gpu.device_id = 0;  // Unknown discrete AMD GPU.
-            }
+            AMDVideoCardType amd_card_type = GetAMDVideocardType();
+            gpu_info->amd_switchable = (gpu_info->gpu.vendor_id == 0x8086) ||
+                                       (amd_card_type != STANDALONE);
           }
         }