Revert of Move static GL binding initialization to //ui/gl/init.

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 "ui/gl/gl_implementation.h"
-
+#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 "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context_stub_with_extensions.h"
 #include "ui/gl/gl_egl_api_implementation.h"
 #include "ui/gl/gl_gl_api_implementation.h"
+#include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_implementation_osmesa.h"
 #include "ui/gl/gl_osmesa_api_implementation.h"
 
 namespace gl {
 
+namespace {
+
+void GL_BINDING_CALL MarshalClearDepthToClearDepthf(GLclampd depth) {
+  glClearDepthf(static_cast<GLclampf>(depth));
+}
+
+void GL_BINDING_CALL MarshalDepthRangeToDepthRangef(GLclampd z_near,
+                                                    GLclampd z_far) {
+  glDepthRangef(static_cast<GLclampf>(z_near), static_cast<GLclampf>(z_far));
+}
+
+}  // namespace
+
 void GetAllowedGLImplementations(std::vector<GLImplementation>* impls) {
   impls->push_back(kGLImplementationEGLGLES2);
   impls->push_back(kGLImplementationOSMesaGL);
 }
 
+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 =
+          LoadLibraryAndPrintError("libGLESv2.so");
+      if (!gles_library)
+        return false;
+      base::NativeLibrary egl_library = LoadLibraryAndPrintError("libEGL.so");
+      if (!egl_library) {
+        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.";
+        base::UnloadNativeLibrary(egl_library);
+        base::UnloadNativeLibrary(gles_library);
+        return false;
+      }
+
+      SetGLGetProcAddressProc(get_proc_address);
+      AddGLNativeLibrary(egl_library);
+      AddGLNativeLibrary(gles_library);
+      SetGLImplementation(kGLImplementationEGLGLES2);
+
+      InitializeStaticGLBindingsGL();
+      InitializeStaticGLBindingsEGL();
+
+      // These two functions take single precision float rather than double
+      // precision float parameters in GLES.
+      ::gl::g_driver_gl.fn.glClearDepthFn = MarshalClearDepthToClearDepthf;
+      ::gl::g_driver_gl.fn.glDepthRangeFn = MarshalDepthRangeToDepthRangef;
+      break;
+    }
+    case kGLImplementationOSMesaGL:
+      InitializeStaticGLBindingsOSMesaGL();
+      break;
+    case kGLImplementationMockGL: {
+      SetGLImplementation(kGLImplementationMockGL);
+      InitializeStaticGLBindingsGL();
+      break;
+    }
+    default:
+      NOTIMPLEMENTED() << "InitializeStaticGLBindings on Android";
+      return false;
+  }
+
+  return true;
+}
+
 bool InitializeDynamicGLBindings(GLImplementation implementation,
                                  GLContext* context) {
   switch (implementation) {
     case kGLImplementationEGLGLES2:
     case kGLImplementationOSMesaGL:
       InitializeDynamicGLBindingsGL(context);
       break;
     case kGLImplementationMockGL:
       if (!context) {
         scoped_refptr<GLContextStubWithExtensions> mock_context(
             new GLContextStubWithExtensions());
         mock_context->SetGLVersionString("opengl es 3.0");
         InitializeDynamicGLBindingsGL(mock_context.get());
-      } else {
+      } else
         InitializeDynamicGLBindingsGL(context);
-      }
       break;
     default:
       NOTREACHED() << "InitializeDynamicGLBindings on Android";
       return false;
   }
 
   return true;
 }
 
+void InitializeDebugGLBindings() {
+  InitializeDebugGLBindingsEGL();
+  InitializeDebugGLBindingsGL();
+  InitializeDebugGLBindingsOSMESA();
+}
+
+void ClearGLBindings() {
+  ClearGLBindingsEGL();
+  ClearGLBindingsGL();
+  ClearGLBindingsOSMESA();
+  SetGLImplementation(kGLImplementationNone);
+
+  UnloadGLNativeLibraries();
+}
+
 bool GetGLWindowSystemBindingInfo(GLWindowSystemBindingInfo* info) {
   switch (GetGLImplementation()) {
     case kGLImplementationEGLGLES2:
       return GetGLWindowSystemBindingInfoEGL(info);
     default:
       return false;
   }
   return false;
 }
 
 }  // namespace gl