Add few LOG(ERROR)s when LoadLibrary fails

ui/gl/gl_implementation_android.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/base_paths.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/native_library.h"
 #include "base/path_service.h"
@@ skipping 39 matching lines @@
 
 bool InitializeStaticGLBindings(GLImplementation implementation) {
   // Prevent reinitialization with a different implementation. Once the gpu
   // unit tests have initialized with kGLImplementationMock, we don't want to
   // later switch to another GL implementation.
   DCHECK_EQ(kGLImplementationNone, GetGLImplementation());
 
   switch (implementation) {
     case kGLImplementationEGLGLES2: {
       base::NativeLibrary gles_library = LoadLibrary("libGLESv2.so");
-      if (!gles_library)
+      if (!gles_library) {
+        LOG(ERROR) << "Failed to load libGLESv2.so.";
         return false;
+      }
       base::NativeLibrary egl_library = LoadLibrary("libEGL.so");
       if (!egl_library) {
+        LOG(ERROR) << "Failed to load libEGL.so.";
         base::UnloadNativeLibrary(gles_library);
         return false;
       }
 
       GLGetProcAddressProc get_proc_address =
           reinterpret_cast<GLGetProcAddressProc>(
               base::GetFunctionPointerFromNativeLibrary(
                   egl_library, "eglGetProcAddress"));
       if (!get_proc_address) {
         LOG(ERROR) << "eglGetProcAddress not found.";
@@ skipping 39 matching lines @@
     case kGLImplementationMockGL:
       if (!context) {
         scoped_refptr<GLContextStubWithExtensions> mock_context(
             new GLContextStubWithExtensions());
         mock_context->SetGLVersionString("opengl es 3.0");
         InitializeDynamicGLBindingsGL(mock_context.get());
       } else
         InitializeDynamicGLBindingsGL(context);
       break;
     default:
+      NOTIMPLEMENTED() << "InitializeDynamicGLBindings on Android";

[no sievers, 2014/02/12 17:20:43]

NOTREACHED()

[hyunki, 2014/02/14 02:00:36]

Done.

       return false;
   }
 
   return true;
 }
 
 void InitializeDebugGLBindings() {
   InitializeDebugGLBindingsEGL();
   InitializeDebugGLBindingsGL();
 }
@@ skipping 10 matching lines @@
   switch (GetGLImplementation()) {
     case kGLImplementationEGLGLES2:
       return GetGLWindowSystemBindingInfoEGL(info);
     default:
       return false;
   }
   return false;
 }
 
 }  // namespace gfx