Convert the pp::proxy namespace to the ppapi::proxy namespace.

ppapi/proxy/ppb_context_3d_proxy.cc

Index: ppapi/proxy/ppb_context_3d_proxy.cc
diff --git a/ppapi/proxy/ppb_context_3d_proxy.cc b/ppapi/proxy/ppb_context_3d_proxy.cc
index 397b8081c158abd65f828c6eb6488a00c192424a..8360b58d5f5f55c8ceaef7c907697114f17caf10 100644
--- a/ppapi/proxy/ppb_context_3d_proxy.cc
+++ b/ppapi/proxy/ppb_context_3d_proxy.cc
@@ -19,15 +19,13 @@
 #include "ppapi/thunk/resource_creation_api.h"
 #include "ppapi/thunk/thunk.h"
 
-using ppapi::HostResource;
-using ppapi::Resource;
 using ppapi::thunk::EnterFunctionNoLock;
 using ppapi::thunk::EnterResourceNoLock;
 using ppapi::thunk::PPB_Context3D_API;
 using ppapi::thunk::PPB_Surface3D_API;
 using ppapi::thunk::ResourceCreationAPI;
 
-namespace pp {
+namespace ppapi {
 namespace proxy {
 
 namespace {
@@ -534,7 +532,7 @@ PPB_Context3D_Proxy::~PPB_Context3D_Proxy() {
 // static
 const InterfaceProxy::Info* PPB_Context3D_Proxy::GetInfo() {
   static const Info info = {
-    ::ppapi::thunk::GetPPB_Context3D_Thunk(),
+    thunk::GetPPB_Context3D_Thunk(),
     PPB_CONTEXT_3D_DEV_INTERFACE,
     INTERFACE_ID_PPB_CONTEXT_3D,
     false,
@@ -546,7 +544,7 @@ const InterfaceProxy::Info* PPB_Context3D_Proxy::GetInfo() {
 // static
 const InterfaceProxy::Info* PPB_Context3D_Proxy::GetTextureMappingInfo() {
   static const Info info = {
-    ::ppapi::thunk::GetPPB_GLESChromiumTextureMapping_Thunk(),
+    thunk::GetPPB_GLESChromiumTextureMapping_Thunk(),
     PPB_GLES_CHROMIUM_TEXTURE_MAPPING_DEV_INTERFACE,
     INTERFACE_ID_NONE,  // CONTEXT_3D is the canonical one.
     false,
@@ -730,4 +728,4 @@ void PPB_Context3D_Proxy::OnMsgGetTransferBuffer(
 }
 
 }  // namespace proxy
-}  // namespace pp
+}  // namespace ppapi