I hope this will fix a generateMipmaps crash when needRenderTarget fails.
This fixes this crash in 7.0.524.0 on a user's Windows XP service pack 3 box.
0x014946f3 [libGLESv2.dll - texture.cpp:1382] gl::Texture2D::generateMipmaps()
0x0149786f [libGLESv2.dll - libglesv2.cpp:2114] glGenerateMipmap
0x01c53199 [chrome.dll - gles2_cmd_decoder.cc:2437] gpu::gles2::GLES2DecoderImpl::DoGenerateMipmap(unsigned int)
0x01c52216 [chrome.dll - gles2_cmd_decoder.cc:2214] gpu::gles2::GLES2DecoderImpl::DoCommand(unsigned int,unsigned int,void const *)
0x01c4fa78 [chrome.dll - cmd_parser.cc:56] gpu::CommandParser::ProcessCommand()
0x01c4f8ba [chrome.dll - gpu_processor.cc:100] gpu::GPUProcessor::ProcessCommands()
0x01ecdcce [chrome.dll - callback.h:119] CallbackImpl<BrowsingDataRemover,void ( BrowsingDataRemover::*)(void),Tuple0>::RunWithParams(Tuple0 const &)
0x01c4f2d9 [chrome.dll - callback.h:79] CallbackRunner<Tuple0>::Run()
0x01c4edce [chrome.dll - command_buffer_service.cc:80] gpu::CommandBufferService::Flush(int)
0x01d6b9b1 [chrome.dll - gpu_command_buffer_stub.cc:129] GpuCommandBufferStub::OnFlush(int,gpu::CommandBuffer::State *)
This might be glGenerateMipmaps after a device lost.
Review URL: http://codereview.appspot.com/2227044
git-svn-id: https://angleproject.googlecode.com/svn/trunk@429 736b8ea6-26fd-11df-bfd4-992fa37f6226
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